189021967 has 2 divisors, whose sum is σ = 189021968. Its totient is φ = 189021966.

The previous prime is 189021961. The next prime is 189021979. The reversal of 189021967 is 769120981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189021967 - 2⁷ = 189021839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189021961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94510983 + 94510984.

It is an arithmetic number, because the mean of its divisors is an integer number (94510984).

Almost surely, 2^189021967 is an apocalyptic number.

189021967 is a deficient number, since it is larger than the sum of its proper divisors (1).

189021967 is an equidigital number, since it uses as much as digits as its factorization.

189021967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 189021967 is about 13748.5259937202. The cubic root of 189021967 is about 573.9015874938.

The spelling of 189021967 in words is "one hundred eighty-nine million, twenty-one thousand, nine hundred sixty-seven".