156942897 has 4 divisors (see below), whose sum is σ = 209257200. Its totient is φ = 104628596.

The previous prime is 156942881. The next prime is 156942923. The reversal of 156942897 is 798249651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 798249651 = 3 ⋅266083217.

It is a cyclic number.

It is not a de Polignac number, because 156942897 - 2⁴ = 156942881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (156942397) 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, 26157147 + ... + 26157152.

It is an arithmetic number, because the mean of its divisors is an integer number (52314300).

Almost surely, 2^156942897 is an apocalyptic number.

It is an amenable number.

156942897 is a deficient number, since it is larger than the sum of its proper divisors (52314303).

156942897 is an equidigital number, since it uses as much as digits as its factorization.

156942897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52314302.

The product of its digits is 1088640, while the sum is 51.

The square root of 156942897 is about 12527.6852211412. The cubic root of 156942897 is about 539.4036592409.

The spelling of 156942897 in words is "one hundred fifty-six million, nine hundred forty-two thousand, eight hundred ninety-seven".