422239979 has 4 divisors (see below), whose sum is σ = 482559984. Its totient is φ = 361919976.

The previous prime is 422239969. The next prime is 422239997. The reversal of 422239979 is 979932224.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 422239979 - 2¹² = 422235883 is a prime.

It is a super-4 number, since 4×422239979⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422239969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30159992 + ... + 30160005.

It is an arithmetic number, because the mean of its divisors is an integer number (120639996).

Almost surely, 2^422239979 is an apocalyptic number.

422239979 is a deficient number, since it is larger than the sum of its proper divisors (60320005).

422239979 is an equidigital number, since it uses as much as digits as its factorization.

422239979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60320004.

The product of its digits is 489888, while the sum is 47.

The square root of 422239979 is about 20548.4787514794. The cubic root of 422239979 is about 750.2162215102.

The spelling of 422239979 in words is "four hundred twenty-two million, two hundred thirty-nine thousand, nine hundred seventy-nine".