156959897 has 4 divisors (see below), whose sum is σ = 157300836. Its totient is φ = 156618960.

The previous prime is 156959879. The next prime is 156959903. The reversal of 156959897 is 798959651.

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

It can be written as a sum of positive squares in 2 ways, for example, as 110229001 + 46730896 = 10499^2 + 6836^2 .

It is a cyclic number.

It is not a de Polignac number, because 156959897 - 2⁶ = 156959833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156959497) 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, 169778 + ... + 170699.

It is an arithmetic number, because the mean of its divisors is an integer number (39325209).

Almost surely, 2^156959897 is an apocalyptic number.

It is an amenable number.

156959897 is a deficient number, since it is larger than the sum of its proper divisors (340939).

156959897 is an equidigital number, since it uses as much as digits as its factorization.

156959897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340938.

The product of its digits is 6123600, while the sum is 59.

The square root of 156959897 is about 12528.3637000208. The cubic root of 156959897 is about 539.4231345433.

The spelling of 156959897 in words is "one hundred fifty-six million, nine hundred fifty-nine thousand, eight hundred ninety-seven".