628627957 has 2 divisors, whose sum is σ = 628627958. Its totient is φ = 628627956.

The previous prime is 628627943. The next prime is 628628003. The reversal of 628627957 is 759726826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 521939716 + 106688241 = 22846^2 + 10329^2 .

It is a cyclic number.

It is not a de Polignac number, because 628627957 - 2⁷ = 628627829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628627757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314313978 + 314313979.

It is an arithmetic number, because the mean of its divisors is an integer number (314313979).

Almost surely, 2^628627957 is an apocalyptic number.

It is an amenable number.

628627957 is a deficient number, since it is larger than the sum of its proper divisors (1).

628627957 is an equidigital number, since it uses as much as digits as its factorization.

628627957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 52.

The square root of 628627957 is about 25072.4541479290. The cubic root of 628627957 is about 856.6391077718.

It can be divided in two parts, 6286 and 27957, that added together give a palindrome (34243).

The spelling of 628627957 in words is "six hundred twenty-eight million, six hundred twenty-seven thousand, nine hundred fifty-seven".