630426779 has 2 divisors, whose sum is σ = 630426780. Its totient is φ = 630426778.

The previous prime is 630426761. The next prime is 630426781. The reversal of 630426779 is 977624036.

It is a happy number.

630426779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 630426779 - 2⁸ = 630426523 is a prime.

Together with 630426781, 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 (630326779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315213389 + 315213390.

It is an arithmetic number, because the mean of its divisors is an integer number (315213390).

Almost surely, 2^630426779 is an apocalyptic number.

630426779 is a deficient number, since it is larger than the sum of its proper divisors (1).

630426779 is an equidigital number, since it uses as much as digits as its factorization.

630426779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 44.

The square root of 630426779 is about 25108.3009978772. The cubic root of 630426779 is about 857.4554219814.

The spelling of 630426779 in words is "six hundred thirty million, four hundred twenty-six thousand, seven hundred seventy-nine".