189688319 has 2 divisors, whose sum is σ = 189688320. Its totient is φ = 189688318.

The previous prime is 189688271. The next prime is 189688321. The reversal of 189688319 is 913886981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189688319 - 2²⁴ = 172911103 is a prime.

It is a super-2 number, since 2×189688319² = 71963316730091522, which contains 22 as substring.

Together with 189688321, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189688339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94844159 + 94844160.

It is an arithmetic number, because the mean of its divisors is an integer number (94844160).

Almost surely, 2^189688319 is an apocalyptic number.

189688319 is a deficient number, since it is larger than the sum of its proper divisors (1).

189688319 is an equidigital number, since it uses as much as digits as its factorization.

189688319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 53.

The square root of 189688319 is about 13772.7382535210. The cubic root of 189688319 is about 574.5751811106.

The spelling of 189688319 in words is "one hundred eighty-nine million, six hundred eighty-eight thousand, three hundred nineteen".