157861871 has 2 divisors, whose sum is σ = 157861872. Its totient is φ = 157861870.

The previous prime is 157861859. The next prime is 157861909. The reversal of 157861871 is 178168751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157861871 - 2⁶ = 157861807 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157861831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78930935 + 78930936.

It is an arithmetic number, because the mean of its divisors is an integer number (78930936).

Almost surely, 2^157861871 is an apocalyptic number.

157861871 is a deficient number, since it is larger than the sum of its proper divisors (1).

157861871 is an equidigital number, since it uses as much as digits as its factorization.

157861871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 44.

The square root of 157861871 is about 12564.3094119812. The cubic root of 157861871 is about 540.4544311428.

The spelling of 157861871 in words is "one hundred fifty-seven million, eight hundred sixty-one thousand, eight hundred seventy-one".