157965971 has 2 divisors, whose sum is σ = 157965972. Its totient is φ = 157965970.

The previous prime is 157965959. The next prime is 157966007. The reversal of 157965971 is 179569751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157965971 - 2¹⁴ = 157949587 is a prime.

It is not a weakly prime, because it can be changed into another prime (157965901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78982985 + 78982986.

It is an arithmetic number, because the mean of its divisors is an integer number (78982986).

Almost surely, 2^157965971 is an apocalyptic number.

157965971 is a deficient number, since it is larger than the sum of its proper divisors (1).

157965971 is an equidigital number, since it uses as much as digits as its factorization.

157965971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 595350, while the sum is 50.

The square root of 157965971 is about 12568.4514161451. The cubic root of 157965971 is about 540.5732036358.

The spelling of 157965971 in words is "one hundred fifty-seven million, nine hundred sixty-five thousand, nine hundred seventy-one".