157939499 has 2 divisors, whose sum is σ = 157939500. Its totient is φ = 157939498.

The previous prime is 157939493. The next prime is 157939501. The reversal of 157939499 is 994939751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157939499 - 2²⁴ = 141162283 is a prime.

It is a Sophie Germain prime.

Together with 157939501, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157939493) 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, 78969749 + 78969750.

It is an arithmetic number, because the mean of its divisors is an integer number (78969750).

Almost surely, 2^157939499 is an apocalyptic number.

157939499 is a deficient number, since it is larger than the sum of its proper divisors (1).

157939499 is an equidigital number, since it uses as much as digits as its factorization.

157939499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2755620, while the sum is 56.

The square root of 157939499 is about 12567.3982589874. The cubic root of 157939499 is about 540.5430054583.

The spelling of 157939499 in words is "one hundred fifty-seven million, nine hundred thirty-nine thousand, four hundred ninety-nine".