157988591 has 8 divisors (see below), whose sum is σ = 168309120. Its totient is φ = 147868632.

The previous prime is 157988581. The next prime is 157988609. The reversal of 157988591 is 195889751.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 157988591 - 2²⁶ = 90879727 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 (157988521) 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, 48515 + ... + 51668.

It is an arithmetic number, because the mean of its divisors is an integer number (21038640).

Almost surely, 2^157988591 is an apocalyptic number.

157988591 is a deficient number, since it is larger than the sum of its proper divisors (10320529).

157988591 is a wasteful number, since it uses less digits than its factorization.

157988591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100285.

The product of its digits is 907200, while the sum is 53.

The square root of 157988591 is about 12569.3512561309. The cubic root of 157988591 is about 540.5990049358.

It can be divided in two parts, 15798 and 8591, that added together give a cube (24389 = 29³).

The spelling of 157988591 in words is "one hundred fifty-seven million, nine hundred eighty-eight thousand, five hundred ninety-one".