641877 has 8 divisors (see below), whose sum is σ = 900960. Its totient is φ = 405360.

The previous prime is 641873. The next prime is 641881. The reversal of 641877 is 778146.

It is an interprime number because it is at equal distance from previous prime (641873) and next prime (641881).

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

It is not a de Polignac number, because 641877 - 2² = 641873 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641873) 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, 5574 + ... + 5687.

It is an arithmetic number, because the mean of its divisors is an integer number (112620).

2⁶⁴¹⁸⁷⁷ is an apocalyptic number.

It is an amenable number.

641877 is a deficient number, since it is larger than the sum of its proper divisors (259083).

641877 is a wasteful number, since it uses less digits than its factorization.

641877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11283.

The product of its digits is 9408, while the sum is 33.

The square root of 641877 is about 801.1722661201. The cubic root of 641877 is about 86.2615527478.

The spelling of 641877 in words is "six hundred forty-one thousand, eight hundred seventy-seven".