157538617 has 2 divisors, whose sum is σ = 157538618. Its totient is φ = 157538616.

The previous prime is 157538593. The next prime is 157538639. The reversal of 157538617 is 716835751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157025961 + 512656 = 12531^2 + 716^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157538617 is a prime.

It is a super-3 number, since 3×157538617³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (157538657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78769308 + 78769309.

It is an arithmetic number, because the mean of its divisors is an integer number (78769309).

Almost surely, 2^157538617 is an apocalyptic number.

It is an amenable number.

157538617 is a deficient number, since it is larger than the sum of its proper divisors (1).

157538617 is an equidigital number, since it uses as much as digits as its factorization.

157538617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 43.

The square root of 157538617 is about 12551.4388418221. The cubic root of 157538617 is about 540.0852825982.

The spelling of 157538617 in words is "one hundred fifty-seven million, five hundred thirty-eight thousand, six hundred seventeen".