639233 has 8 divisors (see below), whose sum is σ = 744768. Its totient is φ = 537264.

The previous prime is 639211. The next prime is 639253. The reversal of 639233 is 332936.

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

It is not a de Polignac number, because 639233 - 2⁶ = 639169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (639253) 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, 491 + ... + 1232.

It is an arithmetic number, because the mean of its divisors is an integer number (93096).

2⁶³⁹²³³ is an apocalyptic number.

It is an amenable number.

639233 is a deficient number, since it is larger than the sum of its proper divisors (105535).

639233 is a wasteful number, since it uses less digits than its factorization.

639233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783.

The product of its digits is 2916, while the sum is 26.

The square root of 639233 is about 799.5204812886. The cubic root of 639233 is about 86.1429477686.

The spelling of 639233 in words is "six hundred thirty-nine thousand, two hundred thirty-three".