641583 has 6 divisors (see below), whose sum is σ = 926744. Its totient is φ = 427716.

The previous prime is 641581. The next prime is 641623. The reversal of 641583 is 385146.

It is not a de Polignac number, because 641583 - 2¹ = 641581 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35635 + ... + 35652.

2⁶⁴¹⁵⁸³ is an apocalyptic number.

641583 is a deficient number, since it is larger than the sum of its proper divisors (285161).

641583 is a wasteful number, since it uses less digits than its factorization.

641583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71293 (or 71290 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 641583 is about 800.9887639661. The cubic root of 641583 is about 86.2483805619.

The spelling of 641583 in words is "six hundred forty-one thousand, five hundred eighty-three".