16992431 has 2 divisors, whose sum is σ = 16992432. Its totient is φ = 16992430.

The previous prime is 16992421. The next prime is 16992497. The reversal of 16992431 is 13429961.

It is a weak prime.

It is an emirp because it is prime and its reverse (13429961) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16992431 is a prime.

It is a super-2 number, since 2×16992431² = 577485422579522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 16992391 and 16992400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16992421) 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 as a sum of consecutive naturals, namely, 8496215 + 8496216.

It is an arithmetic number, because the mean of its divisors is an integer number (8496216).

Almost surely, 2^16992431 is an apocalyptic number.

16992431 is a deficient number, since it is larger than the sum of its proper divisors (1).

16992431 is an equidigital number, since it uses as much as digits as its factorization.

16992431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 35.

The square root of 16992431 is about 4122.1876473543. The cubic root of 16992431 is about 257.0899925571.

The spelling of 16992431 in words is "sixteen million, nine hundred ninety-two thousand, four hundred thirty-one".