442113979 has 2 divisors, whose sum is σ = 442113980. Its totient is φ = 442113978.

The previous prime is 442113967. The next prime is 442114009. The reversal of 442113979 is 979311244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442113979 - 2¹⁷ = 441982907 is a prime.

It is not a weakly prime, because it can be changed into another prime (442113949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221056989 + 221056990.

It is an arithmetic number, because the mean of its divisors is an integer number (221056990).

Almost surely, 2^442113979 is an apocalyptic number.

442113979 is a deficient number, since it is larger than the sum of its proper divisors (1).

442113979 is an equidigital number, since it uses as much as digits as its factorization.

442113979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 442113979 is about 21026.5065809801. The cubic root of 442113979 is about 761.8066316772.

The spelling of 442113979 in words is "four hundred forty-two million, one hundred thirteen thousand, nine hundred seventy-nine".