189457657 has 2 divisors, whose sum is σ = 189457658. Its totient is φ = 189457656.

The previous prime is 189457651. The next prime is 189457727. The reversal of 189457657 is 756754981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180069561 + 9388096 = 13419^2 + 3064^2 .

It is a cyclic number.

It is not a de Polignac number, because 189457657 - 2⁷ = 189457529 is a prime.

It is not a weakly prime, because it can be changed into another prime (189457651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94728828 + 94728829.

It is an arithmetic number, because the mean of its divisors is an integer number (94728829).

Almost surely, 2^189457657 is an apocalyptic number.

It is an amenable number.

189457657 is a deficient number, since it is larger than the sum of its proper divisors (1).

189457657 is an equidigital number, since it uses as much as digits as its factorization.

189457657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2116800, while the sum is 52.

The square root of 189457657 is about 13764.3618449967. The cubic root of 189457657 is about 574.3421911588.

The spelling of 189457657 in words is "one hundred eighty-nine million, four hundred fifty-seven thousand, six hundred fifty-seven".