422745779 has 2 divisors, whose sum is σ = 422745780. Its totient is φ = 422745778.

The previous prime is 422745641. The next prime is 422745781. The reversal of 422745779 is 977547224.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 422745779 - 2⁸ = 422745523 is a prime.

Together with 422745781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (422745179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211372889 + 211372890.

It is an arithmetic number, because the mean of its divisors is an integer number (211372890).

Almost surely, 2^422745779 is an apocalyptic number.

422745779 is a deficient number, since it is larger than the sum of its proper divisors (1).

422745779 is an equidigital number, since it uses as much as digits as its factorization.

422745779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987840, while the sum is 47.

The square root of 422745779 is about 20560.7825483370. The cubic root of 422745779 is about 750.5156625601.

The spelling of 422745779 in words is "four hundred twenty-two million, seven hundred forty-five thousand, seven hundred seventy-nine".