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6698081 = 13515237
BaseRepresentation
bin11001100011010001100001
3110121022001002
4121203101201
53203314311
6355321345
7110634635
oct31432141
913538032
106698081
113865405
1222b0255
131506980
14c64dc5
158c493b
hex663461

6698081 has 4 divisors (see below), whose sum is σ = 7213332. Its totient is φ = 6182832.

The previous prime is 6698071. The next prime is 6698099. The reversal of 6698081 is 1808966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1808966 = 2904483.

It can be written as a sum of positive squares in 2 ways, for example, as 739600 + 5958481 = 860^2 + 2441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-6698081 is a prime.

It is a super-2 number, since 2×66980812 = 89728578165122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6698071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257606 + ... + 257631.

It is an arithmetic number, because the mean of its divisors is an integer number (1803333).

Almost surely, 26698081 is an apocalyptic number.

It is an amenable number.

6698081 is a deficient number, since it is larger than the sum of its proper divisors (515251).

6698081 is a wasteful number, since it uses less digits than its factorization.

6698081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515250.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 6698081 is about 2588.0651073727. The cubic root of 6698081 is about 188.5023628473.

The spelling of 6698081 in words is "six million, six hundred ninety-eight thousand, eighty-one".

Divisors: 1 13 515237 6698081