6397797313 has 4 divisors (see below), whose sum is σ = 6440735700. Its totient is φ = 6354858928.

The previous prime is 6397797229. The next prime is 6397797319. The reversal of 6397797313 is 3137977936.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 947223729 + 5450573584 = 30777^2 + 73828^2 .

It is a cyclic number.

It is not a de Polignac number, because 6397797313 - 2¹³ = 6397789121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6397797319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21468970 + ... + 21469267.

It is an arithmetic number, because the mean of its divisors is an integer number (1610183925).

Almost surely, 2^6397797313 is an apocalyptic number.

It is an amenable number.

6397797313 is a deficient number, since it is larger than the sum of its proper divisors (42938387).

6397797313 is a wasteful number, since it uses less digits than its factorization.

6397797313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42938386.

The product of its digits is 4500846, while the sum is 55.

The square root of 6397797313 is about 79986.2320215173. The cubic root of 6397797313 is about 1856.4225096840.

The spelling of 6397797313 in words is "six billion, three hundred ninety-seven million, seven hundred ninety-seven thousand, three hundred thirteen".