628694587 has 2 divisors, whose sum is σ = 628694588. Its totient is φ = 628694586.

The previous prime is 628694569. The next prime is 628694611. The reversal of 628694587 is 785496826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628694587 - 2²⁷ = 494476859 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (628694557) 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, 314347293 + 314347294.

It is an arithmetic number, because the mean of its divisors is an integer number (314347294).

Almost surely, 2^628694587 is an apocalyptic number.

628694587 is a deficient number, since it is larger than the sum of its proper divisors (1).

628694587 is an equidigital number, since it uses as much as digits as its factorization.

628694587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 55.

The square root of 628694587 is about 25073.7828617861. The cubic root of 628694587 is about 856.6693725448.

The spelling of 628694587 in words is "six hundred twenty-eight million, six hundred ninety-four thousand, five hundred eighty-seven".