639367 has 4 divisors (see below), whose sum is σ = 654280. Its totient is φ = 624456.

The previous prime is 639361. The next prime is 639371. The reversal of 639367 is 763936.

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

It is a cyclic number.

It is not a de Polignac number, because 639367 - 2¹¹ = 637319 is a prime.

It is a Duffinian number.

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 639367.

It is not an unprimeable number, because it can be changed into a prime (639361) 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, 7392 + ... + 7477.

It is an arithmetic number, because the mean of its divisors is an integer number (163570).

2⁶³⁹³⁶⁷ is an apocalyptic number.

639367 is a deficient number, since it is larger than the sum of its proper divisors (14913).

639367 is a wasteful number, since it uses less digits than its factorization.

639367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14912.

The product of its digits is 20412, while the sum is 34.

The square root of 639367 is about 799.6042771271. The cubic root of 639367 is about 86.1489666217.

The spelling of 639367 in words is "six hundred thirty-nine thousand, three hundred sixty-seven".