420055101979 has 2 divisors, whose sum is σ = 420055101980. Its totient is φ = 420055101978.

The previous prime is 420055101953. The next prime is 420055102021. The reversal of 420055101979 is 979101550024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420055101979 - 2²³ = 420046713371 is a prime.

It is not a weakly prime, because it can be changed into another prime (420055104979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210027550989 + 210027550990.

It is an arithmetic number, because the mean of its divisors is an integer number (210027550990).

Almost surely, 2^420055101979 is an apocalyptic number.

420055101979 is a deficient number, since it is larger than the sum of its proper divisors (1).

420055101979 is an equidigital number, since it uses as much as digits as its factorization.

420055101979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 43.

The spelling of 420055101979 in words is "four hundred twenty billion, fifty-five million, one hundred one thousand, nine hundred seventy-nine".