252189979 has 2 divisors, whose sum is σ = 252189980. Its totient is φ = 252189978.

The previous prime is 252189923. The next prime is 252189989. The reversal of 252189979 is 979981252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 252189979 - 2¹⁹ = 251665691 is a prime.

It is not a weakly prime, because it can be changed into another prime (252189919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126094989 + 126094990.

It is an arithmetic number, because the mean of its divisors is an integer number (126094990).

Almost surely, 2^252189979 is an apocalyptic number.

252189979 is a deficient number, since it is larger than the sum of its proper divisors (1).

252189979 is an equidigital number, since it uses as much as digits as its factorization.

252189979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 52.

The square root of 252189979 is about 15880.4905150943. The cubic root of 252189979 is about 631.7946468369.

The spelling of 252189979 in words is "two hundred fifty-two million, one hundred eighty-nine thousand, nine hundred seventy-nine".