628505699 has 2 divisors, whose sum is σ = 628505700. Its totient is φ = 628505698.

The previous prime is 628505677. The next prime is 628505707. The reversal of 628505699 is 996505826.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628505699 - 2²⁴ = 611728483 is a prime.

It is not a weakly prime, because it can be changed into another prime (628505609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314252849 + 314252850.

It is an arithmetic number, because the mean of its divisors is an integer number (314252850).

Almost surely, 2^628505699 is an apocalyptic number.

628505699 is a deficient number, since it is larger than the sum of its proper divisors (1).

628505699 is an equidigital number, since it uses as much as digits as its factorization.

628505699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The square root of 628505699 is about 25070.0159353759. The cubic root of 628505699 is about 856.5835700073.

The spelling of 628505699 in words is "six hundred twenty-eight million, five hundred five thousand, six hundred ninety-nine".