157936517 has 2 divisors, whose sum is σ = 157936518. Its totient is φ = 157936516.

The previous prime is 157936489. The next prime is 157936529. The reversal of 157936517 is 715639751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126922756 + 31013761 = 11266^2 + 5569^2 .

It is an emirp because it is prime and its reverse (715639751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157936517 - 2⁶ = 157936453 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 (157932517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78968258 + 78968259.

It is an arithmetic number, because the mean of its divisors is an integer number (78968259).

Almost surely, 2^157936517 is an apocalyptic number.

It is an amenable number.

157936517 is a deficient number, since it is larger than the sum of its proper divisors (1).

157936517 is an equidigital number, since it uses as much as digits as its factorization.

157936517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 198450, while the sum is 44.

The square root of 157936517 is about 12567.2796181194. The cubic root of 157936517 is about 540.5396035029.

The spelling of 157936517 in words is "one hundred fifty-seven million, nine hundred thirty-six thousand, five hundred seventeen".