641252833 has 8 divisors (see below), whose sum is σ = 707423976. Its totient is φ = 577488000.

The previous prime is 641252827. The next prime is 641252849. The reversal of 641252833 is 338252146.

It can be written as a sum of positive squares in 4 ways, for example, as 29778849 + 611473984 = 5457^2 + 24728^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641252833 is a prime.

It is a super-2 number, since 2×641252833² = 822410391661051778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641252893) 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, 601018 + ... + 602083.

It is an arithmetic number, because the mean of its divisors is an integer number (88427997).

Almost surely, 2^641252833 is an apocalyptic number.

It is an amenable number.

641252833 is a deficient number, since it is larger than the sum of its proper divisors (66171143).

641252833 is a wasteful number, since it uses less digits than its factorization.

641252833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203155.

The product of its digits is 34560, while the sum is 34.

The square root of 641252833 is about 25322.9704616184. The cubic root of 641252833 is about 862.3358317522.

The spelling of 641252833 in words is "six hundred forty-one million, two hundred fifty-two thousand, eight hundred thirty-three".