639114699 has 4 divisors (see below), whose sum is σ = 852152936. Its totient is φ = 426076464.

The previous prime is 639114617. The next prime is 639114703. The reversal of 639114699 is 996411936.

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

It is not a de Polignac number, because 639114699 - 2²³ = 630726091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639124699) 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, 106519114 + ... + 106519119.

It is an arithmetic number, because the mean of its divisors is an integer number (213038234).

Almost surely, 2^639114699 is an apocalyptic number.

639114699 is a deficient number, since it is larger than the sum of its proper divisors (213038237).

639114699 is a wasteful number, since it uses less digits than its factorization.

639114699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213038236.

The product of its digits is 314928, while the sum is 48.

The square root of 639114699 is about 25280.7179288880. The cubic root of 639114699 is about 861.3763336549.

The spelling of 639114699 in words is "six hundred thirty-nine million, one hundred fourteen thousand, six hundred ninety-nine".