16899931 has 8 divisors (see below), whose sum is σ = 17432064. Its totient is φ = 16375080.

The previous prime is 16899889. The next prime is 16899959. The reversal of 16899931 is 13999861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16899931 - 2⁷ = 16899803 is a prime.

It is a super-2 number, since 2×16899931² = 571215335609522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16899031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3096 + ... + 6586.

It is an arithmetic number, because the mean of its divisors is an integer number (2179008).

Almost surely, 2^16899931 is an apocalyptic number.

16899931 is a deficient number, since it is larger than the sum of its proper divisors (532133).

16899931 is a wasteful number, since it uses less digits than its factorization.

16899931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3641.

The product of its digits is 104976, while the sum is 46.

The square root of 16899931 is about 4110.9525660119. The cubic root of 16899931 is about 256.6226451366.

The spelling of 16899931 in words is "sixteen million, eight hundred ninety-nine thousand, nine hundred thirty-one".