6394027657 has 2 divisors, whose sum is σ = 6394027658. Its totient is φ = 6394027656.

The previous prime is 6394027639. The next prime is 6394027663. The reversal of 6394027657 is 7567204936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5290525696 + 1103501961 = 72736^2 + 33219^2 .

It is a cyclic number.

It is not a de Polignac number, because 6394027657 - 2⁷ = 6394027529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6394027657.

It is not a weakly prime, because it can be changed into another prime (6394027957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3197013828 + 3197013829.

It is an arithmetic number, because the mean of its divisors is an integer number (3197013829).

Almost surely, 2^6394027657 is an apocalyptic number.

It is an amenable number.

6394027657 is a deficient number, since it is larger than the sum of its proper divisors (1).

6394027657 is an equidigital number, since it uses as much as digits as its factorization.

6394027657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 49.

The square root of 6394027657 is about 79962.6641439616. The cubic root of 6394027657 is about 1856.0578295288.

The spelling of 6394027657 in words is "six billion, three hundred ninety-four million, twenty-seven thousand, six hundred fifty-seven".