16869481 has 4 divisors (see below), whose sum is σ = 16877700. Its totient is φ = 16861264.

The previous prime is 16869467. The next prime is 16869499. The reversal of 16869481 is 18496861.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 13838400 + 3031081 = 3720^2 + 1741^2 .

It is a cyclic number.

It is not a de Polignac number, because 16869481 - 2⁷ = 16869353 is a prime.

It is a super-2 number, since 2×16869481² = 569158778418722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16869401) 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, 1875 + ... + 6103.

It is an arithmetic number, because the mean of its divisors is an integer number (4219425).

Almost surely, 2^16869481 is an apocalyptic number.

It is an amenable number.

16869481 is a deficient number, since it is larger than the sum of its proper divisors (8219).

16869481 is an equidigital number, since it uses as much as digits as its factorization.

16869481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8218.

The product of its digits is 82944, while the sum is 43.

The square root of 16869481 is about 4107.2473750676. The cubic root of 16869481 is about 256.4684264126.

The spelling of 16869481 in words is "sixteen million, eight hundred sixty-nine thousand, four hundred eighty-one".