641744239 has 8 divisors (see below), whose sum is σ = 653659920. Its totient is φ = 629863296.

The previous prime is 641744227. The next prime is 641744249. The reversal of 641744239 is 932447146.

641744239 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 cyclic number.

It is not a de Polignac number, because 641744239 - 2¹³ = 641736047 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 (641744249) 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, 30199 + ... + 46855.

It is an arithmetic number, because the mean of its divisors is an integer number (81707490).

Almost surely, 2^641744239 is an apocalyptic number.

641744239 is a deficient number, since it is larger than the sum of its proper divisors (11915681).

641744239 is a wasteful number, since it uses less digits than its factorization.

641744239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17369.

The product of its digits is 145152, while the sum is 40.

The square root of 641744239 is about 25332.6713751235. The cubic root of 641744239 is about 862.5560510797.

The spelling of 641744239 in words is "six hundred forty-one million, seven hundred forty-four thousand, two hundred thirty-nine".