108154989 has 6 divisors (see below), whose sum is σ = 156223886. Its totient is φ = 72103320.

The previous prime is 108154979. The next prime is 108154999. The reversal of 108154989 is 989451801.

It is an interprime number because it is at equal distance from previous prime (108154979) and next prime (108154999).

It can be written as a sum of positive squares in only one way, i.e., 56746089 + 51408900 = 7533^2 + 7170^2 .

It is not a de Polignac number, because 108154989 - 2⁵ = 108154957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108154919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6008602 + ... + 6008619.

Almost surely, 2^108154989 is an apocalyptic number.

It is an amenable number.

108154989 is a deficient number, since it is larger than the sum of its proper divisors (48068897).

108154989 is a wasteful number, since it uses less digits than its factorization.

108154989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12017227 (or 12017224 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 108154989 is about 10399.7590837480. The cubic root of 108154989 is about 476.4480119834.

The spelling of 108154989 in words is "one hundred eight million, one hundred fifty-four thousand, nine hundred eighty-nine".