16137931 has 2 divisors, whose sum is σ = 16137932. Its totient is φ = 16137930.

The previous prime is 16137923. The next prime is 16137941. The reversal of 16137931 is 13973161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16137931 - 2³ = 16137923 is a prime.

It is a super-2 number, since 2×16137931² = 520865633921522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16137893 and 16137902.

It is not a weakly prime, because it can be changed into another prime (16137941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8068965 + 8068966.

It is an arithmetic number, because the mean of its divisors is an integer number (8068966).

Almost surely, 2^16137931 is an apocalyptic number.

16137931 is a deficient number, since it is larger than the sum of its proper divisors (1).

16137931 is an equidigital number, since it uses as much as digits as its factorization.

16137931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 31.

The square root of 16137931 is about 4017.2043761800. The cubic root of 16137931 is about 252.7062315389.

The spelling of 16137931 in words is "sixteen million, one hundred thirty-seven thousand, nine hundred thirty-one".