108639259 has 4 divisors (see below), whose sum is σ = 108684304. Its totient is φ = 108594216.

The previous prime is 108639253. The next prime is 108639287. The reversal of 108639259 is 952936801.

It is a happy number.

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 108639259 - 2¹⁷ = 108508187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108639253) 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, 18687 + ... + 23800.

It is an arithmetic number, because the mean of its divisors is an integer number (27171076).

Almost surely, 2^108639259 is an apocalyptic number.

108639259 is a deficient number, since it is larger than the sum of its proper divisors (45045).

108639259 is an equidigital number, since it uses as much as digits as its factorization.

108639259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45044.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 108639259 is about 10423.0158303631. The cubic root of 108639259 is about 477.1580607967.

The spelling of 108639259 in words is "one hundred eight million, six hundred thirty-nine thousand, two hundred fifty-nine".