157918793 has 2 divisors, whose sum is σ = 157918794. Its totient is φ = 157918792.

The previous prime is 157918769. The next prime is 157918843. The reversal of 157918793 is 397819751.

It is an a-pointer prime, because the next prime (157918843) can be obtained adding 157918793 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157452304 + 466489 = 12548^2 + 683^2 .

It is a cyclic number.

It is not a de Polignac number, because 157918793 - 2¹² = 157914697 is a prime.

It is not a weakly prime, because it can be changed into another prime (157918723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78959396 + 78959397.

It is an arithmetic number, because the mean of its divisors is an integer number (78959397).

Almost surely, 2^157918793 is an apocalyptic number.

It is an amenable number.

157918793 is a deficient number, since it is larger than the sum of its proper divisors (1).

157918793 is an equidigital number, since it uses as much as digits as its factorization.

157918793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 50.

The square root of 157918793 is about 12566.5744337906. The cubic root of 157918793 is about 540.5193825464.

The spelling of 157918793 in words is "one hundred fifty-seven million, nine hundred eighteen thousand, seven hundred ninety-three".