157981079 has 2 divisors, whose sum is σ = 157981080. Its totient is φ = 157981078.

The previous prime is 157981073. The next prime is 157981123. The reversal of 157981079 is 970189751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157981079 - 2⁴ = 157981063 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 (157981073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78990539 + 78990540.

It is an arithmetic number, because the mean of its divisors is an integer number (78990540).

Almost surely, 2^157981079 is an apocalyptic number.

157981079 is a deficient number, since it is larger than the sum of its proper divisors (1).

157981079 is an equidigital number, since it uses as much as digits as its factorization.

157981079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 47.

The square root of 157981079 is about 12569.0524304738. The cubic root of 157981079 is about 540.5904367136.

The spelling of 157981079 in words is "one hundred fifty-seven million, nine hundred eighty-one thousand, seventy-nine".