639532714 has 8 divisors (see below), whose sum is σ = 966301668. Its totient is φ = 317432160.

The previous prime is 639532709. The next prime is 639532763. The reversal of 639532714 is 417235936.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 635796225 + 3736489 = 25215^2 + 1933^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1166757 + ... + 1167304.

Almost surely, 2^639532714 is an apocalyptic number.

639532714 is a deficient number, since it is larger than the sum of its proper divisors (326768954).

639532714 is a wasteful number, since it uses less digits than its factorization.

639532714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334200.

The product of its digits is 136080, while the sum is 40.

The square root of 639532714 is about 25288.9840444412. The cubic root of 639532714 is about 861.5640880365.

The spelling of 639532714 in words is "six hundred thirty-nine million, five hundred thirty-two thousand, seven hundred fourteen".