157686697 has 8 divisors (see below), whose sum is σ = 184609152. Its totient is φ = 131863200.

The previous prime is 157686691. The next prime is 157686707. The reversal of 157686697 is 796686751.

157686697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157686697 - 2⁷ = 157686569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157686691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274429 + ... + 275002.

It is an arithmetic number, because the mean of its divisors is an integer number (23076144).

Almost surely, 2^157686697 is an apocalyptic number.

It is an amenable number.

157686697 is a deficient number, since it is larger than the sum of its proper divisors (26922455).

157686697 is an equidigital number, since it uses as much as digits as its factorization.

157686697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549479.

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

The square root of 157686697 is about 12557.3363815739. The cubic root of 157686697 is about 540.2544491286.

The spelling of 157686697 in words is "one hundred fifty-seven million, six hundred eighty-six thousand, six hundred ninety-seven".