157493971 has 2 divisors, whose sum is σ = 157493972. Its totient is φ = 157493970.

The previous prime is 157493957. The next prime is 157493977. The reversal of 157493971 is 179394751.

157493971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157493971 - 2⁵ = 157493939 is a prime.

It is not a weakly prime, because it can be changed into another prime (157493977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78746985 + 78746986.

It is an arithmetic number, because the mean of its divisors is an integer number (78746986).

Almost surely, 2^157493971 is an apocalyptic number.

157493971 is a deficient number, since it is larger than the sum of its proper divisors (1).

157493971 is an equidigital number, since it uses as much as digits as its factorization.

157493971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 46.

The square root of 157493971 is about 12549.6601946029. The cubic root of 157493971 is about 540.0342582289.

The spelling of 157493971 in words is "one hundred fifty-seven million, four hundred ninety-three thousand, nine hundred seventy-one".