109878489 has 12 divisors (see below), whose sum is σ = 181386816. Its totient is φ = 62787672.

The previous prime is 109878481. The next prime is 109878499. The reversal of 109878489 is 984878901.

109878489 is a `hidden beast` number, since 1 + 0 + 98 + 78 + 489 = 666.

It is not a de Polignac number, because 109878489 - 2³ = 109878481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109878481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 871989 + ... + 872114.

It is an arithmetic number, because the mean of its divisors is an integer number (15115568).

Almost surely, 2^109878489 is an apocalyptic number.

It is an amenable number.

109878489 is a deficient number, since it is larger than the sum of its proper divisors (71508327).

109878489 is a wasteful number, since it uses less digits than its factorization.

109878489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744116 (or 1744113 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 109878489 is about 10482.2940714330. The cubic root of 109878489 is about 478.9654933643.

The spelling of 109878489 in words is "one hundred nine million, eight hundred seventy-eight thousand, four hundred eighty-nine".