639363 has 8 divisors (see below), whose sum is σ = 882000. Its totient is φ = 411488.

The previous prime is 639361. The next prime is 639371. The reversal of 639363 is 363936.

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

It is a cyclic number.

It is not a de Polignac number, because 639363 - 2¹ = 639361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 639363.

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 7 ways as a sum of consecutive naturals, for example, 3588 + ... + 3761.

It is an arithmetic number, because the mean of its divisors is an integer number (110250).

2⁶³⁹³⁶³ is an apocalyptic number.

639363 is a deficient number, since it is larger than the sum of its proper divisors (242637).

639363 is a wasteful number, since it uses less digits than its factorization.

639363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7381.

The product of its digits is 8748, while the sum is 30.

The square root of 639363 is about 799.6017758860. The cubic root of 639363 is about 86.1487869666.

The spelling of 639363 in words is "six hundred thirty-nine thousand, three hundred sixty-three".