157696687 has 4 divisors (see below), whose sum is σ = 157931680. Its totient is φ = 157461696.

The previous prime is 157696681. The next prime is 157696691. The reversal of 157696687 is 786696751.

157696687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157696687 - 2⁷ = 157696559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157696681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116487 + ... + 117832.

It is an arithmetic number, because the mean of its divisors is an integer number (39482920).

Almost surely, 2^157696687 is an apocalyptic number.

157696687 is a deficient number, since it is larger than the sum of its proper divisors (234993).

157696687 is an equidigital number, since it uses as much as digits as its factorization.

157696687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234992.

The product of its digits is 3810240, while the sum is 55.

The square root of 157696687 is about 12557.7341507137. The cubic root of 157696687 is about 540.2658578863.

The spelling of 157696687 in words is "one hundred fifty-seven million, six hundred ninety-six thousand, six hundred eighty-seven".