157087685 has 4 divisors (see below), whose sum is σ = 188505228. Its totient is φ = 125670144.

The previous prime is 157087613. The next prime is 157087691. The reversal of 157087685 is 586780751.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 586780751 = 29 ⋅20233819.

It can be written as a sum of positive squares in 2 ways, for example, as 96216481 + 60871204 = 9809^2 + 7802^2 .

It is a cyclic number.

It is not a de Polignac number, because 157087685 - 2²⁰ = 156039109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15708764 + ... + 15708773.

It is an arithmetic number, because the mean of its divisors is an integer number (47126307).

Almost surely, 2^157087685 is an apocalyptic number.

It is an amenable number.

157087685 is a deficient number, since it is larger than the sum of its proper divisors (31417543).

157087685 is an equidigital number, since it uses as much as digits as its factorization.

157087685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31417542.

The product of its (nonzero) digits is 470400, while the sum is 47.

The square root of 157087685 is about 12533.4626101489. The cubic root of 157087685 is about 539.5694842511.

The spelling of 157087685 in words is "one hundred fifty-seven million, eighty-seven thousand, six hundred eighty-five".