157969793 has 2 divisors, whose sum is σ = 157969794. Its totient is φ = 157969792.

The previous prime is 157969787. The next prime is 157969807. The reversal of 157969793 is 397969751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153338689 + 4631104 = 12383^2 + 2152^2 .

It is an emirp because it is prime and its reverse (397969751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157969793 - 2²⁰ = 156921217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157969703) 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, 78984896 + 78984897.

It is an arithmetic number, because the mean of its divisors is an integer number (78984897).

Almost surely, 2^157969793 is an apocalyptic number.

It is an amenable number.

157969793 is a deficient number, since it is larger than the sum of its proper divisors (1).

157969793 is an equidigital number, since it uses as much as digits as its factorization.

157969793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3214890, while the sum is 56.

The square root of 157969793 is about 12568.6034625968. The cubic root of 157969793 is about 540.5775633387.

The spelling of 157969793 in words is "one hundred fifty-seven million, nine hundred sixty-nine thousand, seven hundred ninety-three".