222379979 has 2 divisors, whose sum is σ = 222379980. Its totient is φ = 222379978.

The previous prime is 222379951. The next prime is 222379999. The reversal of 222379979 is 979973222.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222379979 - 2²⁴ = 205602763 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222379999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111189989 + 111189990.

It is an arithmetic number, because the mean of its divisors is an integer number (111189990).

Almost surely, 2^222379979 is an apocalyptic number.

222379979 is a deficient number, since it is larger than the sum of its proper divisors (1).

222379979 is an equidigital number, since it uses as much as digits as its factorization.

222379979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 50.

The square root of 222379979 is about 14912.4102344323. The cubic root of 222379979 is about 605.8501619182.

The spelling of 222379979 in words is "two hundred twenty-two million, three hundred seventy-nine thousand, nine hundred seventy-nine".