189455657 has 4 divisors (see below), whose sum is σ = 189955920. Its totient is φ = 188955396.

The previous prime is 189455641. The next prime is 189455677. The reversal of 189455657 is 756554981.

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 189455657 - 2⁴ = 189455641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189455677) 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, 249563 + ... + 250320.

It is an arithmetic number, because the mean of its divisors is an integer number (47488980).

Almost surely, 2^189455657 is an apocalyptic number.

It is an amenable number.

189455657 is a deficient number, since it is larger than the sum of its proper divisors (500263).

189455657 is an equidigital number, since it uses as much as digits as its factorization.

189455657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500262.

The product of its digits is 1512000, while the sum is 50.

The square root of 189455657 is about 13764.2891934164. The cubic root of 189455657 is about 574.3401701471.

The spelling of 189455657 in words is "one hundred eighty-nine million, four hundred fifty-five thousand, six hundred fifty-seven".