639441095 has 8 divisors (see below), whose sum is σ = 774501264. Its totient is φ = 506771584.

The previous prime is 639441053. The next prime is 639441109. The reversal of 639441095 is 590144936.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-639441095 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 597074 + ... + 598143.

It is an arithmetic number, because the mean of its divisors is an integer number (96812658).

Almost surely, 2^639441095 is an apocalyptic number.

639441095 is a deficient number, since it is larger than the sum of its proper divisors (135060169).

639441095 is a wasteful number, since it uses less digits than its factorization.

639441095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195329.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 639441095 is about 25287.1725386608. The cubic root of 639441095 is about 861.5229437197.

The spelling of 639441095 in words is "six hundred thirty-nine million, four hundred forty-one thousand, ninety-five".