641368313 has 4 divisors (see below), whose sum is σ = 675124560. Its totient is φ = 607612068.

The previous prime is 641368309. The next prime is 641368319. The reversal of 641368313 is 313863146.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 641368313 - 2² = 641368309 is a prime.

It is a super-2 number, since 2×641368313² = 822706625840931938, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (641368319) 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, 16878095 + ... + 16878132.

It is an arithmetic number, because the mean of its divisors is an integer number (168781140).

Almost surely, 2^641368313 is an apocalyptic number.

It is an amenable number.

641368313 is a deficient number, since it is larger than the sum of its proper divisors (33756247).

641368313 is a wasteful number, since it uses less digits than its factorization.

641368313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33756246.

The product of its digits is 31104, while the sum is 35.

The square root of 641368313 is about 25325.2505022162. The cubic root of 641368313 is about 862.3875932205.

The spelling of 641368313 in words is "six hundred forty-one million, three hundred sixty-eight thousand, three hundred thirteen".