641330239 has 4 divisors (see below), whose sum is σ = 699633000. Its totient is φ = 583027480.

The previous prime is 641330227. The next prime is 641330279. The reversal of 641330239 is 932033146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 641330239 - 2⁷ = 641330111 is a prime.

It is a super-2 number, since 2×641330239² = 822608950911594242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641330239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641330279) 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, 29151364 + ... + 29151385.

It is an arithmetic number, because the mean of its divisors is an integer number (174908250).

Almost surely, 2^641330239 is an apocalyptic number.

641330239 is a deficient number, since it is larger than the sum of its proper divisors (58302761).

641330239 is a wasteful number, since it uses less digits than its factorization.

641330239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58302760.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 641330239 is about 25324.4987906967. The cubic root of 641330239 is about 862.3705280416.

The spelling of 641330239 in words is "six hundred forty-one million, three hundred thirty thousand, two hundred thirty-nine".