16492991 has 2 divisors, whose sum is σ = 16492992. Its totient is φ = 16492990.

The previous prime is 16492981. The next prime is 16492999. The reversal of 16492991 is 19929461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16492991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16492999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8246495 + 8246496.

It is an arithmetic number, because the mean of its divisors is an integer number (8246496).

Almost surely, 2^16492991 is an apocalyptic number.

16492991 is a deficient number, since it is larger than the sum of its proper divisors (1).

16492991 is an equidigital number, since it uses as much as digits as its factorization.

16492991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 41.

The square root of 16492991 is about 4061.1563624170. The cubic root of 16492991 is about 254.5461155711.

The spelling of 16492991 in words is "sixteen million, four hundred ninety-two thousand, nine hundred ninety-one".