425516779 has 2 divisors, whose sum is σ = 425516780. Its totient is φ = 425516778.

The previous prime is 425516771. The next prime is 425516827. The reversal of 425516779 is 977615524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 425516779 - 2³ = 425516771 is a prime.

It is not a weakly prime, because it can be changed into another prime (425516771) 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, 212758389 + 212758390.

It is an arithmetic number, because the mean of its divisors is an integer number (212758390).

Almost surely, 2^425516779 is an apocalyptic number.

425516779 is a deficient number, since it is larger than the sum of its proper divisors (1).

425516779 is an equidigital number, since it uses as much as digits as its factorization.

425516779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 46.

The square root of 425516779 is about 20628.0580520804. The cubic root of 425516779 is about 752.1519110592.

The spelling of 425516779 in words is "four hundred twenty-five million, five hundred sixteen thousand, seven hundred seventy-nine".