189657371 has 4 divisors (see below), whose sum is σ = 189714672. Its totient is φ = 189600072.

The previous prime is 189657367. The next prime is 189657383. The reversal of 189657371 is 173756981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 173756981 = 1291 ⋅134591.

It is a cyclic number.

It is not a de Polignac number, because 189657371 - 2² = 189657367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189657311) 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, 23360 + ... + 30413.

It is an arithmetic number, because the mean of its divisors is an integer number (47428668).

Almost surely, 2^189657371 is an apocalyptic number.

189657371 is a deficient number, since it is larger than the sum of its proper divisors (57301).

189657371 is an equidigital number, since it uses as much as digits as its factorization.

189657371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57300.

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

The square root of 189657371 is about 13771.6146838343. The cubic root of 189657371 is about 574.5439317433.

The spelling of 189657371 in words is "one hundred eighty-nine million, six hundred fifty-seven thousand, three hundred seventy-one".