108439749 has 48 divisors (see below), whose sum is σ = 180740160. Its totient is φ = 63704160.

The previous prime is 108439717. The next prime is 108439757. The reversal of 108439749 is 947934801.

It is not a de Polignac number, because 108439749 - 2⁵ = 108439717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108439769) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1306462 + ... + 1306544.

It is an arithmetic number, because the mean of its divisors is an integer number (3765420).

Almost surely, 2^108439749 is an apocalyptic number.

It is an amenable number.

108439749 is a deficient number, since it is larger than the sum of its proper divisors (72300411).

108439749 is an equidigital number, since it uses as much as digits as its factorization.

108439749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 108439749 is about 10413.4407858306. The cubic root of 108439749 is about 476.8657903343.

The spelling of 108439749 in words is "one hundred eight million, four hundred thirty-nine thousand, seven hundred forty-nine".