189137957 has 4 divisors (see below), whose sum is σ = 189172320. Its totient is φ = 189103596.

The previous prime is 189137909. The next prime is 189137987. The reversal of 189137957 is 759731981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 189137957 - 2⁸ = 189137701 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 (189137987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6857 + ... + 20622.

It is an arithmetic number, because the mean of its divisors is an integer number (47293080).

Almost surely, 2^189137957 is an apocalyptic number.

It is an amenable number.

189137957 is a deficient number, since it is larger than the sum of its proper divisors (34363).

189137957 is an equidigital number, since it uses as much as digits as its factorization.

189137957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34362.

The product of its digits is 476280, while the sum is 50.

The square root of 189137957 is about 13752.7436171842. The cubic root of 189137957 is about 574.0189516905.

The spelling of 189137957 in words is "one hundred eighty-nine million, one hundred thirty-seven thousand, nine hundred fifty-seven".