639914 has 32 divisors (see below), whose sum is σ = 1166400. Its totient is φ = 259840.

The previous prime is 639911. The next prime is 639937. The reversal of 639914 is 419936.

639914 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 639914.

It is not an unprimeable number, because it can be changed into a prime (639911) 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, 10817 + ... + 10875.

It is an arithmetic number, because the mean of its divisors is an integer number (36450).

2⁶³⁹⁹¹⁴ is an apocalyptic number.

639914 is a deficient number, since it is larger than the sum of its proper divisors (526486).

639914 is a wasteful number, since it uses less digits than its factorization.

639914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118.

The product of its digits is 5832, while the sum is 32.

The square root of 639914 is about 799.9462481942. The cubic root of 639914 is about 86.1735273995.

The spelling of 639914 in words is "six hundred thirty-nine thousand, nine hundred fourteen".