16163491 has 2 divisors, whose sum is σ = 16163492. Its totient is φ = 16163490.

The previous prime is 16163489. The next prime is 16163519. The reversal of 16163491 is 19436161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16163491 - 2¹ = 16163489 is a prime.

It is a super-2 number, since 2×16163491² = 522516882614162, which contains 22 as substring.

Together with 16163489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16163461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8081745 + 8081746.

It is an arithmetic number, because the mean of its divisors is an integer number (8081746).

Almost surely, 2^16163491 is an apocalyptic number.

16163491 is a deficient number, since it is larger than the sum of its proper divisors (1).

16163491 is an equidigital number, since it uses as much as digits as its factorization.

16163491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 16163491 is about 4020.3844343545. The cubic root of 16163491 is about 252.8395770953.

The spelling of 16163491 in words is "sixteen million, one hundred sixty-three thousand, four hundred ninety-one".