639614 has 8 divisors (see below), whose sum is σ = 964128. Its totient is φ = 318240.

The previous prime is 639601. The next prime is 639631. The reversal of 639614 is 416936.

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

It is a congruent number.

It is an unprimeable number.

639614 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182 + ... + 1145.

It is an arithmetic number, because the mean of its divisors is an integer number (120516).

2⁶³⁹⁶¹⁴ is an apocalyptic number.

639614 is a deficient number, since it is larger than the sum of its proper divisors (324514).

639614 is a wasteful number, since it uses less digits than its factorization.

639614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570.

The product of its digits is 3888, while the sum is 29.

The square root of 639614 is about 799.7587136130. The cubic root of 639614 is about 86.1600588714.

The spelling of 639614 in words is "six hundred thirty-nine thousand, six hundred fourteen".