639086059 has 4 divisors (see below), whose sum is σ = 640080616. Its totient is φ = 638091504.

The previous prime is 639086051. The next prime is 639086099. The reversal of 639086059 is 950680936.

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 639086059 - 2³ = 639086051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639086051) 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, 496314 + ... + 497599.

It is an arithmetic number, because the mean of its divisors is an integer number (160020154).

Almost surely, 2^639086059 is an apocalyptic number.

639086059 is a deficient number, since it is larger than the sum of its proper divisors (994557).

639086059 is an equidigital number, since it uses as much as digits as its factorization.

639086059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994556.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 639086059 is about 25280.1514829322. The cubic root of 639086059 is about 861.3634668008.

The spelling of 639086059 in words is "six hundred thirty-nine million, eighty-six thousand, fifty-nine".