968408639 has 16 divisors (see below), whose sum is σ = 1064219040. Its totient is φ = 873922560.

The previous prime is 968408599. The next prime is 968408653. The reversal of 968408639 is 936804869.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-968408639 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 (968408669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1438607 + ... + 1439279.

It is an arithmetic number, because the mean of its divisors is an integer number (66513690).

Almost surely, 2^968408639 is an apocalyptic number.

968408639 is a deficient number, since it is larger than the sum of its proper divisors (95810401).

968408639 is a wasteful number, since it uses less digits than its factorization.

968408639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450.

The product of its (nonzero) digits is 2239488, while the sum is 53.

The square root of 968408639 is about 31119.2647567387. The cubic root of 968408639 is about 989.3566677051.

The spelling of 968408639 in words is "nine hundred sixty-eight million, four hundred eight thousand, six hundred thirty-nine".