16931089 has 8 divisors (see below), whose sum is σ = 19873088. Its totient is φ = 14119920.

The previous prime is 16931081. The next prime is 16931111. The reversal of 16931089 is 98013961.

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 16931089 - 2³ = 16931081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16931081) 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, 32427 + ... + 32944.

It is an arithmetic number, because the mean of its divisors is an integer number (2484136).

Almost surely, 2^16931089 is an apocalyptic number.

It is an amenable number.

16931089 is a deficient number, since it is larger than the sum of its proper divisors (2941999).

16931089 is an equidigital number, since it uses as much as digits as its factorization.

16931089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65415.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 16931089 is about 4114.7404535402. The cubic root of 16931089 is about 256.7802579988.

The spelling of 16931089 in words is "sixteen million, nine hundred thirty-one thousand, eighty-nine".