157408591 has 6 divisors (see below), whose sum is σ = 158606376. Its totient is φ = 156213000.

The previous prime is 157408583. The next prime is 157408649. The reversal of 157408591 is 195804751.

It is a happy number.

It is not a de Polignac number, because 157408591 - 2³ = 157408583 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 (157408541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 153661 + ... + 154681.

It is an arithmetic number, because the mean of its divisors is an integer number (26434396).

Almost surely, 2^157408591 is an apocalyptic number.

157408591 is a deficient number, since it is larger than the sum of its proper divisors (1197785).

157408591 is an frugal number, since it uses more digits than its factorization.

157408591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193 (or 1172 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 157408591 is about 12546.2580477208. The cubic root of 157408591 is about 539.9366535203.

The spelling of 157408591 in words is "one hundred fifty-seven million, four hundred eight thousand, five hundred ninety-one".