16402931 has 2 divisors, whose sum is σ = 16402932. Its totient is φ = 16402930.

The previous prime is 16402879. The next prime is 16402949. The reversal of 16402931 is 13920461.

It is a strong prime.

It is an emirp because it is prime and its reverse (13920461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16402931 - 2²² = 12208627 is a prime.

It is a super-2 number, since 2×16402931² = 538112290781522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16402931.

It is not a weakly prime, because it can be changed into another prime (16402031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8201465 + 8201466.

It is an arithmetic number, because the mean of its divisors is an integer number (8201466).

Almost surely, 2^16402931 is an apocalyptic number.

16402931 is a deficient number, since it is larger than the sum of its proper divisors (1).

16402931 is an equidigital number, since it uses as much as digits as its factorization.

16402931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 16402931 is about 4050.0532095270. The cubic root of 16402931 is about 254.0819532189.

The spelling of 16402931 in words is "sixteen million, four hundred two thousand, nine hundred thirty-one".