422720578939 has 2 divisors, whose sum is σ = 422720578940. Its totient is φ = 422720578938.

The previous prime is 422720578913. The next prime is 422720578949. The reversal of 422720578939 is 939875027224.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422720578939 is a prime.

It is not a weakly prime, because it can be changed into another prime (422720578949) 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, 211360289469 + 211360289470.

It is an arithmetic number, because the mean of its divisors is an integer number (211360289470).

Almost surely, 2^422720578939 is an apocalyptic number.

422720578939 is a deficient number, since it is larger than the sum of its proper divisors (1).

422720578939 is an equidigital number, since it uses as much as digits as its factorization.

422720578939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 422720578939 in words is "four hundred twenty-two billion, seven hundred twenty million, five hundred seventy-eight thousand, nine hundred thirty-nine".