16893491 has 2 divisors, whose sum is σ = 16893492. Its totient is φ = 16893490.

The previous prime is 16893479. The next prime is 16893493. The reversal of 16893491 is 19439861.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16893491 is a prime.

Together with 16893493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16893493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8446745 + 8446746.

It is an arithmetic number, because the mean of its divisors is an integer number (8446746).

Almost surely, 2^16893491 is an apocalyptic number.

16893491 is a deficient number, since it is larger than the sum of its proper divisors (1).

16893491 is an equidigital number, since it uses as much as digits as its factorization.

16893491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 41.

The square root of 16893491 is about 4110.1692179277. The cubic root of 16893491 is about 256.5900442184.

The spelling of 16893491 in words is "sixteen million, eight hundred ninety-three thousand, four hundred ninety-one".