627697657 has 2 divisors, whose sum is σ = 627697658. Its totient is φ = 627697656.

The previous prime is 627697649. The next prime is 627697667. The reversal of 627697657 is 756796726.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 586172521 + 41525136 = 24211^2 + 6444^2 .

It is a cyclic number.

It is not a de Polignac number, because 627697657 - 2³ = 627697649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 627697598 and 627697607.

It is not a weakly prime, because it can be changed into another prime (627697667) 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, 313848828 + 313848829.

It is an arithmetic number, because the mean of its divisors is an integer number (313848829).

Almost surely, 2^627697657 is an apocalyptic number.

It is an amenable number.

627697657 is a deficient number, since it is larger than the sum of its proper divisors (1).

627697657 is an equidigital number, since it uses as much as digits as its factorization.

627697657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6667920, while the sum is 55.

The square root of 627697657 is about 25053.8950464793. The cubic root of 627697657 is about 856.2163220313.

The spelling of 627697657 in words is "six hundred twenty-seven million, six hundred ninety-seven thousand, six hundred fifty-seven".