157689 has 12 divisors (see below), whose sum is σ = 260416. Its totient is φ = 90072.

The previous prime is 157679. The next prime is 157721. The reversal of 157689 is 986751.

157689 is a `hidden beast` number, since 1 + 576 + 89 = 666.

It is not a de Polignac number, because 157689 - 2⁷ = 157561 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 (157639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1189 + ... + 1314.

2¹⁵⁷⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

157689 is a deficient number, since it is larger than the sum of its proper divisors (102727).

157689 is a wasteful number, since it uses less digits than its factorization.

157689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516 (or 2513 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 157689 is about 397.1007428852. The cubic root of 157689 is about 54.0257079238.

The spelling of 157689 in words is "one hundred fifty-seven thousand, six hundred eighty-nine".