189267979 has 2 divisors, whose sum is σ = 189267980. Its totient is φ = 189267978.

The previous prime is 189267961. The next prime is 189268003. The reversal of 189267979 is 979762981.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189267979 - 2¹¹ = 189265931 is a prime.

It is not a weakly prime, because it can be changed into another prime (180267979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94633989 + 94633990.

It is an arithmetic number, because the mean of its divisors is an integer number (94633990).

Almost surely, 2^189267979 is an apocalyptic number.

189267979 is a deficient number, since it is larger than the sum of its proper divisors (1).

189267979 is an equidigital number, since it uses as much as digits as its factorization.

189267979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 58.

The square root of 189267979 is about 13757.4699345483. The cubic root of 189267979 is about 574.1504571047.

The spelling of 189267979 in words is "one hundred eighty-nine million, two hundred sixty-seven thousand, nine hundred seventy-nine".