16899491 has 16 divisors (see below), whose sum is σ = 20136960. Its totient is φ = 13880160.

The previous prime is 16899413. The next prime is 16899497. The reversal of 16899491 is 19499861.

It is not a de Polignac number, because 16899491 - 2¹⁸ = 16637347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16899497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17930 + ... + 18848.

It is an arithmetic number, because the mean of its divisors is an integer number (1258560).

Almost surely, 2^16899491 is an apocalyptic number.

16899491 is a deficient number, since it is larger than the sum of its proper divisors (3237469).

16899491 is an equidigital number, since it uses as much as digits as its factorization.

16899491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034.

The product of its digits is 139968, while the sum is 47.

The square root of 16899491 is about 4110.8990500862. The cubic root of 16899491 is about 256.6204180083.

The spelling of 16899491 in words is "sixteen million, eight hundred ninety-nine thousand, four hundred ninety-one".