157137986 has 4 divisors (see below), whose sum is σ = 235706982. Its totient is φ = 78568992.

The previous prime is 157137983. The next prime is 157138027. The reversal of 157137986 is 689731751.

157137986 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 154529761 + 2608225 = 12431^2 + 1615^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 157137986.

It is not an unprimeable number, because it can be changed into a prime (157137983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39284495 + ... + 39284498.

Almost surely, 2^157137986 is an apocalyptic number.

157137986 is a deficient number, since it is larger than the sum of its proper divisors (78568996).

157137986 is an equidigital number, since it uses as much as digits as its factorization.

157137986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78568995.

The product of its digits is 317520, while the sum is 47.

The square root of 157137986 is about 12535.4691176677. The cubic root of 157137986 is about 539.6270698987.

The spelling of 157137986 in words is "one hundred fifty-seven million, one hundred thirty-seven thousand, nine hundred eighty-six".