156943091 has 4 divisors (see below), whose sum is σ = 156999192. Its totient is φ = 156886992.

The previous prime is 156943079. The next prime is 156943151. The reversal of 156943091 is 190349651.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 156943091 - 2²² = 152748787 is a prime.

It is a super-2 number, since 2×156943091² = 49262267625268562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156943001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23621 + ... + 29526.

It is an arithmetic number, because the mean of its divisors is an integer number (39249798).

Almost surely, 2^156943091 is an apocalyptic number.

156943091 is a deficient number, since it is larger than the sum of its proper divisors (56101).

156943091 is an equidigital number, since it uses as much as digits as its factorization.

156943091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56100.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 156943091 is about 12527.6929639898. The cubic root of 156943091 is about 539.4038814964.

The spelling of 156943091 in words is "one hundred fifty-six million, nine hundred forty-three thousand, ninety-one".