641837 has 4 divisors (see below), whose sum is σ = 733536. Its totient is φ = 550140.

The previous prime is 641833. The next prime is 641843. The reversal of 641837 is 738146.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 641837 - 2² = 641833 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 (641833) 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 3 ways as a sum of consecutive naturals, for example, 45839 + ... + 45852.

It is an arithmetic number, because the mean of its divisors is an integer number (183384).

2⁶⁴¹⁸³⁷ is an apocalyptic number.

It is an amenable number.

641837 is a deficient number, since it is larger than the sum of its proper divisors (91699).

641837 is an equidigital number, since it uses as much as digits as its factorization.

641837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91698.

The product of its digits is 4032, while the sum is 29.

The square root of 641837 is about 801.1473023109. The cubic root of 641837 is about 86.2597608501.

The spelling of 641837 in words is "six hundred forty-one thousand, eight hundred thirty-seven".