157961291 has 2 divisors, whose sum is σ = 157961292. Its totient is φ = 157961290.

The previous prime is 157961257. The next prime is 157961333. The reversal of 157961291 is 192169751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157961291 - 2⁶ = 157961227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (157961591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78980645 + 78980646.

It is an arithmetic number, because the mean of its divisors is an integer number (78980646).

Almost surely, 2^157961291 is an apocalyptic number.

157961291 is a deficient number, since it is larger than the sum of its proper divisors (1).

157961291 is an equidigital number, since it uses as much as digits as its factorization.

157961291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 41.

The square root of 157961291 is about 12568.2652343114. The cubic root of 157961291 is about 540.5678651282.

The spelling of 157961291 in words is "one hundred fifty-seven million, nine hundred sixty-one thousand, two hundred ninety-one".