639068343 has 16 divisors (see below), whose sum is σ = 859684320. Its totient is φ = 422263296.

The previous prime is 639068321. The next prime is 639068351. The reversal of 639068343 is 343860936.

It is not a de Polignac number, because 639068343 - 2²⁵ = 605513911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 639068295 and 639068304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639068303) 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, 213763 + ... + 216731.

It is an arithmetic number, because the mean of its divisors is an integer number (53730270).

Almost surely, 2^639068343 is an apocalyptic number.

639068343 is a deficient number, since it is larger than the sum of its proper divisors (220615977).

639068343 is a wasteful number, since it uses less digits than its factorization.

639068343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3586.

The product of its (nonzero) digits is 279936, while the sum is 42.

The square root of 639068343 is about 25279.8010870339. The cubic root of 639068343 is about 861.3555074887.

The spelling of 639068343 in words is "six hundred thirty-nine million, sixty-eight thousand, three hundred forty-three".