189864319 has 2 divisors, whose sum is σ = 189864320. Its totient is φ = 189864318.

The previous prime is 189864289. The next prime is 189864371. The reversal of 189864319 is 913468981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189864319 - 2²³ = 181475711 is a prime.

It is a super-2 number, since 2×189864319² = 72096919258667522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189864019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94932159 + 94932160.

It is an arithmetic number, because the mean of its divisors is an integer number (94932160).

Almost surely, 2^189864319 is an apocalyptic number.

189864319 is a deficient number, since it is larger than the sum of its proper divisors (1).

189864319 is an equidigital number, since it uses as much as digits as its factorization.

189864319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 49.

The square root of 189864319 is about 13779.1262059682. The cubic root of 189864319 is about 574.7528303768.

The spelling of 189864319 in words is "one hundred eighty-nine million, eight hundred sixty-four thousand, three hundred nineteen".