641313919 has 8 divisors (see below), whose sum is σ = 655342848. Its totient is φ = 627301080.

The previous prime is 641313913. The next prime is 641313929. The reversal of 641313919 is 919313146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641313919 - 2⁷ = 641313791 is a prime.

It is a super-2 number, since 2×641313919² = 822567085406277122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641313913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113184 + ... + 118714.

It is an arithmetic number, because the mean of its divisors is an integer number (81917856).

Almost surely, 2^641313919 is an apocalyptic number.

641313919 is a deficient number, since it is larger than the sum of its proper divisors (14028929).

641313919 is a wasteful number, since it uses less digits than its factorization.

641313919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8045.

The product of its digits is 17496, while the sum is 37.

The square root of 641313919 is about 25324.1765710161. The cubic root of 641313919 is about 862.3632130342.

The spelling of 641313919 in words is "six hundred forty-one million, three hundred thirteen thousand, nine hundred nineteen".