641143982 has 8 divisors (see below), whose sum is σ = 962840736. Its totient is φ = 320197072.

The previous prime is 641143981. The next prime is 641143991. The reversal of 641143982 is 289341146.

641143982 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×641143982² = 822131211309632648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641143981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185318 + ... + 188745.

It is an arithmetic number, because the mean of its divisors is an integer number (120355092).

Almost surely, 2^641143982 is an apocalyptic number.

641143982 is a deficient number, since it is larger than the sum of its proper divisors (321696754).

641143982 is a wasteful number, since it uses less digits than its factorization.

641143982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374922.

The product of its digits is 41472, while the sum is 38.

The square root of 641143982 is about 25320.8211162276. The cubic root of 641143982 is about 862.2870359031.

The spelling of 641143982 in words is "six hundred forty-one million, one hundred forty-three thousand, nine hundred eighty-two".