189590521 has 2 divisors, whose sum is σ = 189590522. Its totient is φ = 189590520.

The previous prime is 189590497. The next prime is 189590543. The reversal of 189590521 is 125095981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177955600 + 11634921 = 13340^2 + 3411^2 .

It is a cyclic number.

It is not a de Polignac number, because 189590521 - 2¹⁷ = 189459449 is a prime.

It is not a weakly prime, because it can be changed into another prime (189590551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94795260 + 94795261.

It is an arithmetic number, because the mean of its divisors is an integer number (94795261).

Almost surely, 2^189590521 is an apocalyptic number.

It is an amenable number.

189590521 is a deficient number, since it is larger than the sum of its proper divisors (1).

189590521 is an equidigital number, since it uses as much as digits as its factorization.

189590521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 40.

The square root of 189590521 is about 13769.1873761671. The cubic root of 189590521 is about 574.4764191631.

It can be divided in two parts, 1895 and 90521, that added together give a square (92416 = 304²).

The spelling of 189590521 in words is "one hundred eighty-nine million, five hundred ninety thousand, five hundred twenty-one".