641833919 has 4 divisors (see below), whose sum is σ = 652712520. Its totient is φ = 630955320.

The previous prime is 641833901. The next prime is 641833943. The reversal of 641833919 is 919338146.

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

It is a cyclic number.

It is not a de Polignac number, because 641833919 - 2⁸ = 641833663 is a prime.

It is a super-2 number, since 2×641833919² = 823901559157797122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 641833919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641833949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5439212 + ... + 5439329.

It is an arithmetic number, because the mean of its divisors is an integer number (163178130).

Almost surely, 2^641833919 is an apocalyptic number.

641833919 is a deficient number, since it is larger than the sum of its proper divisors (10878601).

641833919 is a wasteful number, since it uses less digits than its factorization.

641833919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10878600.

The product of its digits is 139968, while the sum is 44.

The square root of 641833919 is about 25334.4413595406. The cubic root of 641833919 is about 862.5962282609.

The spelling of 641833919 in words is "six hundred forty-one million, eight hundred thirty-three thousand, nine hundred nineteen".