157942793 has 2 divisors, whose sum is σ = 157942794. Its totient is φ = 157942792.

The previous prime is 157942777. The next prime is 157942819. The reversal of 157942793 is 397249751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82391929 + 75550864 = 9077^2 + 8692^2 .

It is a cyclic number.

It is not a de Polignac number, because 157942793 - 2⁴ = 157942777 is a prime.

It is a super-3 number, since 3×157942793³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (157941793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78971396 + 78971397.

It is an arithmetic number, because the mean of its divisors is an integer number (78971397).

Almost surely, 2^157942793 is an apocalyptic number.

It is an amenable number.

157942793 is a deficient number, since it is larger than the sum of its proper divisors (1).

157942793 is an equidigital number, since it uses as much as digits as its factorization.

157942793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 47.

The square root of 157942793 is about 12567.5293116825. The cubic root of 157942793 is about 540.5467633029.

The spelling of 157942793 in words is "one hundred fifty-seven million, nine hundred forty-two thousand, seven hundred ninety-three".