635313997 has 2 divisors, whose sum is σ = 635313998. Its totient is φ = 635313996.

The previous prime is 635313977. The next prime is 635314051. The reversal of 635313997 is 799313536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 601917156 + 33396841 = 24534^2 + 5779^2 .

It is a cyclic number.

It is not a de Polignac number, because 635313997 - 2⁷ = 635313869 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (635313977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317656998 + 317656999.

It is an arithmetic number, because the mean of its divisors is an integer number (317656999).

Almost surely, 2^635313997 is an apocalyptic number.

It is an amenable number.

635313997 is a deficient number, since it is larger than the sum of its proper divisors (1).

635313997 is an equidigital number, since it uses as much as digits as its factorization.

635313997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 459270, while the sum is 46.

The square root of 635313997 is about 25205.4358621310. The cubic root of 635313997 is about 859.6654535246.

It can be divided in two parts, 63531 and 3997, that added together give a triangular number (67528 = T₃₆₇).

The spelling of 635313997 in words is "six hundred thirty-five million, three hundred thirteen thousand, nine hundred ninety-seven".