641893 has 8 divisors (see below), whose sum is σ = 741312. Its totient is φ = 544416.

The previous prime is 641891. The next prime is 641897. The reversal of 641893 is 398146.

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

It is not a de Polignac number, because 641893 - 2¹ = 641891 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641891) 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 7 ways as a sum of consecutive naturals, for example, 321 + ... + 1177.

It is an arithmetic number, because the mean of its divisors is an integer number (92664).

2⁶⁴¹⁸⁹³ is an apocalyptic number.

It is an amenable number.

641893 is a deficient number, since it is larger than the sum of its proper divisors (99419).

641893 is a wasteful number, since it uses less digits than its factorization.

641893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971.

The product of its digits is 5184, while the sum is 31.

The square root of 641893 is about 801.1822514260. The cubic root of 641893 is about 86.2622694861.

The spelling of 641893 in words is "six hundred forty-one thousand, eight hundred ninety-three".