639093 has 16 divisors (see below), whose sum is σ = 1049216. Its totient is φ = 336960.

The previous prime is 639091. The next prime is 639137. The reversal of 639093 is 390936.

It is not a de Polignac number, because 639093 - 2¹ = 639091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 639093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639091) 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, 898 + ... + 1443.

It is an arithmetic number, because the mean of its divisors is an integer number (65576).

2⁶³⁹⁰⁹³ is an apocalyptic number.

It is an amenable number.

639093 is a deficient number, since it is larger than the sum of its proper divisors (410123).

639093 is a wasteful number, since it uses less digits than its factorization.

639093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 639093 is about 799.4329240155. The cubic root of 639093 is about 86.1366585161.

The spelling of 639093 in words is "six hundred thirty-nine thousand, ninety-three".