641520683 has 4 divisors (see below), whose sum is σ = 645606960. Its totient is φ = 637434408.

The previous prime is 641520679. The next prime is 641520701. The reversal of 641520683 is 386025146.

641520683 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 641520683 - 2² = 641520679 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641520673) 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, 2042903 + ... + 2043216.

It is an arithmetic number, because the mean of its divisors is an integer number (161401740).

Almost surely, 2^641520683 is an apocalyptic number.

641520683 is a deficient number, since it is larger than the sum of its proper divisors (4086277).

641520683 is a wasteful number, since it uses less digits than its factorization.

641520683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4086276.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 641520683 is about 25328.2585860142. The cubic root of 641520683 is about 862.4558803449.

The spelling of 641520683 in words is "six hundred forty-one million, five hundred twenty thousand, six hundred eighty-three".