157936489 has 2 divisors, whose sum is σ = 157936490. Its totient is φ = 157936488.

The previous prime is 157936483. The next prime is 157936517. The reversal of 157936489 is 984639751.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95257600 + 62678889 = 9760^2 + 7917^2 .

It is a cyclic number.

It is not a de Polignac number, because 157936489 - 2³ = 157936481 is a prime.

It is not a weakly prime, because it can be changed into another prime (157936481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78968244 + 78968245.

It is an arithmetic number, because the mean of its divisors is an integer number (78968245).

Almost surely, 2^157936489 is an apocalyptic number.

It is an amenable number.

157936489 is a deficient number, since it is larger than the sum of its proper divisors (1).

157936489 is an equidigital number, since it uses as much as digits as its factorization.

157936489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The square root of 157936489 is about 12567.2785041154. The cubic root of 157936489 is about 540.5395715595.

The spelling of 157936489 in words is "one hundred fifty-seven million, nine hundred thirty-six thousand, four hundred eighty-nine".