100016681 has 4 divisors (see below), whose sum is σ = 100069200. Its totient is φ = 99964164.

The previous prime is 100016677. The next prime is 100016689. The reversal of 100016681 is 186610001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186610001 = 19 ⋅9821579.

It is a cyclic number.

It is not a de Polignac number, because 100016681 - 2² = 100016677 is a prime.

It is a super-2 number, since 2×100016681² = 20006672956511522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100016689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23291 + ... + 27248.

It is an arithmetic number, because the mean of its divisors is an integer number (25017300).

Almost surely, 2^100016681 is an apocalyptic number.

It is an amenable number.

100016681 is a deficient number, since it is larger than the sum of its proper divisors (52519).

100016681 is an equidigital number, since it uses as much as digits as its factorization.

100016681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52518.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 100016681 is about 10000.8340152209. The cubic root of 100016681 is about 464.1846907075.

Adding to 100016681 its reverse (186610001), we get a palindrome (286626682).

The spelling of 100016681 in words is "one hundred million, sixteen thousand, six hundred eighty-one".