189109967 has 2 divisors, whose sum is σ = 189109968. Its totient is φ = 189109966.

The previous prime is 189109937. The next prime is 189109969. The reversal of 189109967 is 769901981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189109967 - 2⁶ = 189109903 is a prime.

Together with 189109969, 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 (189109969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94554983 + 94554984.

It is an arithmetic number, because the mean of its divisors is an integer number (94554984).

Almost surely, 2^189109967 is an apocalyptic number.

189109967 is a deficient number, since it is larger than the sum of its proper divisors (1).

189109967 is an equidigital number, since it uses as much as digits as its factorization.

189109967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 50.

The square root of 189109967 is about 13751.7259644017. The cubic root of 189109967 is about 573.9906344711.

The spelling of 189109967 in words is "one hundred eighty-nine million, one hundred nine thousand, nine hundred sixty-seven".