628090979 has 2 divisors, whose sum is σ = 628090980. Its totient is φ = 628090978.

The previous prime is 628090973. The next prime is 628091011. The reversal of 628090979 is 979090826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628090979 - 2²⁸ = 359655523 is a prime.

It is not a weakly prime, because it can be changed into another prime (628090973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314045489 + 314045490.

It is an arithmetic number, because the mean of its divisors is an integer number (314045490).

Almost surely, 2^628090979 is an apocalyptic number.

628090979 is a deficient number, since it is larger than the sum of its proper divisors (1).

628090979 is an equidigital number, since it uses as much as digits as its factorization.

628090979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 628090979 is about 25061.7433352111. The cubic root of 628090979 is about 856.3951227623.

The spelling of 628090979 in words is "six hundred twenty-eight million, ninety thousand, nine hundred seventy-nine".