157942819 has 2 divisors, whose sum is σ = 157942820. Its totient is φ = 157942818.

The previous prime is 157942793. The next prime is 157942843. The reversal of 157942819 is 918249751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157942819 - 2²⁵ = 124388387 is a prime.

It is a super-2 number, since 2×157942819² = 49891868147333522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157942849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78971409 + 78971410.

It is an arithmetic number, because the mean of its divisors is an integer number (78971410).

Almost surely, 2^157942819 is an apocalyptic number.

157942819 is a deficient number, since it is larger than the sum of its proper divisors (1).

157942819 is an equidigital number, since it uses as much as digits as its factorization.

157942819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 46.

The square root of 157942819 is about 12567.5303460943. The cubic root of 157942819 is about 540.5467929639.

The spelling of 157942819 in words is "one hundred fifty-seven million, nine hundred forty-two thousand, eight hundred nineteen".