16136391 has 8 divisors (see below), whose sum is σ = 21868144. Its totient is φ = 10581120.

The previous prime is 16136381. The next prime is 16136413. The reversal of 16136391 is 19363161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16136391 - 2⁵ = 16136359 is a prime.

It is a super-2 number, since 2×16136391² = 520766229009762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16136311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43906 + ... + 44271.

It is an arithmetic number, because the mean of its divisors is an integer number (2733518).

Almost surely, 2^16136391 is an apocalyptic number.

16136391 is a deficient number, since it is larger than the sum of its proper divisors (5731753).

16136391 is an equidigital number, since it uses as much as digits as its factorization.

16136391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88241.

The product of its digits is 2916, while the sum is 30.

The square root of 16136391 is about 4017.0126960218. The cubic root of 16136391 is about 252.6981929211.

The spelling of 16136391 in words is "sixteen million, one hundred thirty-six thousand, three hundred ninety-one".