222423979 has 2 divisors, whose sum is σ = 222423980. Its totient is φ = 222423978.

The previous prime is 222423959. The next prime is 222424009. The reversal of 222423979 is 979324222.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222423979 is a prime.

It is not a weakly prime, because it can be changed into another prime (222423959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111211989 + 111211990.

It is an arithmetic number, because the mean of its divisors is an integer number (111211990).

Almost surely, 2^222423979 is an apocalyptic number.

222423979 is a deficient number, since it is larger than the sum of its proper divisors (1).

222423979 is an equidigital number, since it uses as much as digits as its factorization.

222423979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 222423979 is about 14913.8854427678. The cubic root of 222423979 is about 605.8901170277.

The spelling of 222423979 in words is "two hundred twenty-two million, four hundred twenty-three thousand, nine hundred seventy-nine".