189590977 has 2 divisors, whose sum is σ = 189590978. Its totient is φ = 189590976.

The previous prime is 189590971. The next prime is 189591019. The reversal of 189590977 is 779095981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187388721 + 2202256 = 13689^2 + 1484^2 .

It is a cyclic number.

It is not a de Polignac number, because 189590977 - 2³ = 189590969 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (189590971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94795488 + 94795489.

It is an arithmetic number, because the mean of its divisors is an integer number (94795489).

Almost surely, 2^189590977 is an apocalyptic number.

It is an amenable number.

189590977 is a deficient number, since it is larger than the sum of its proper divisors (1).

189590977 is an equidigital number, since it uses as much as digits as its factorization.

189590977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1428840, while the sum is 55.

The square root of 189590977 is about 13769.2039348686. The cubic root of 189590977 is about 574.4768797365.

The spelling of 189590977 in words is "one hundred eighty-nine million, five hundred ninety thousand, nine hundred seventy-seven".