641963 has 8 divisors (see below), whose sum is σ = 738528. Its totient is φ = 546624.

The previous prime is 641959. The next prime is 641969. The reversal of 641963 is 369146.

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

It is a cyclic number.

It is not a de Polignac number, because 641963 - 2² = 641959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (641969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1895 + ... + 2207.

It is an arithmetic number, because the mean of its divisors is an integer number (92316).

2⁶⁴¹⁹⁶³ is an apocalyptic number.

641963 is a deficient number, since it is larger than the sum of its proper divisors (96565).

641963 is a wasteful number, since it uses less digits than its factorization.

641963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613.

The product of its digits is 3888, while the sum is 29.

The square root of 641963 is about 801.2259356761. The cubic root of 641963 is about 86.2654050758.

The spelling of 641963 in words is "six hundred forty-one thousand, nine hundred sixty-three".