639714 has 8 divisors (see below), whose sum is σ = 1279440. Its totient is φ = 213236.

The previous prime is 639713. The next prime is 639719. The reversal of 639714 is 417936.

It is a happy number.

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

639714 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 639714.

It is not an unprimeable number, because it can be changed into a prime (639713) 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, 53304 + ... + 53315.

It is an arithmetic number, because the mean of its divisors is an integer number (159930).

2⁶³⁹⁷¹⁴ is an apocalyptic number.

639714 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

639714 is a wasteful number, since it uses less digits than its factorization.

639714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106624.

The product of its digits is 4536, while the sum is 30.

The square root of 639714 is about 799.8212300258. The cubic root of 639714 is about 86.1645488486.

The spelling of 639714 in words is "six hundred thirty-nine thousand, seven hundred fourteen".