108779391 has 24 divisors (see below), whose sum is σ = 182259584. Its totient is φ = 61229520.

The previous prime is 108779381. The next prime is 108779393. The reversal of 108779391 is 193977801.

It is not a de Polignac number, because 108779391 - 2¹¹ = 108777343 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108779393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8665 + ... + 17106.

Almost surely, 2^108779391 is an apocalyptic number.

108779391 is a deficient number, since it is larger than the sum of its proper divisors (73480193).

108779391 is a wasteful number, since it uses less digits than its factorization.

108779391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25851 (or 25848 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 45.

The square root of 108779391 is about 10429.7359026967. The cubic root of 108779391 is about 477.3631321039.

The spelling of 108779391 in words is "one hundred eight million, seven hundred seventy-nine thousand, three hundred ninety-one".