156396977 has 12 divisors (see below), whose sum is σ = 175911120. Its totient is φ = 138867960.

The previous prime is 156396973. The next prime is 156396997. The reversal of 156396977 is 779693651.

It is a happy number.

156396977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 156396977 - 2² = 156396973 is a prime.

It is not an unprimeable number, because it can be changed into a prime (156396973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9827 + ... + 20232.

It is an arithmetic number, because the mean of its divisors is an integer number (14659260).

Almost surely, 2^156396977 is an apocalyptic number.

It is an amenable number.

156396977 is a deficient number, since it is larger than the sum of its proper divisors (19514143).

156396977 is a wasteful number, since it uses less digits than its factorization.

156396977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30124 (or 30113 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 53.

The square root of 156396977 is about 12505.8776981066. The cubic root of 156396977 is about 538.7775008347. Note that the first 3 decimals are identical.

The spelling of 156396977 in words is "one hundred fifty-six million, three hundred ninety-six thousand, nine hundred seventy-seven".