16931239 has 8 divisors (see below), whose sum is σ = 18822272. Its totient is φ = 15124320.

The previous prime is 16931231. The next prime is 16931251. The reversal of 16931239 is 93213961.

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 16931239 - 2³ = 16931231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16931231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20604 + ... + 21409.

It is an arithmetic number, because the mean of its divisors is an integer number (2352784).

Almost surely, 2^16931239 is an apocalyptic number.

16931239 is a deficient number, since it is larger than the sum of its proper divisors (1891033).

16931239 is a wasteful number, since it uses less digits than its factorization.

16931239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42057.

The product of its digits is 8748, while the sum is 34.

The square root of 16931239 is about 4114.7586806519. The cubic root of 16931239 is about 256.7810163065.

The spelling of 16931239 in words is "sixteen million, nine hundred thirty-one thousand, two hundred thirty-nine".