108389493 has 12 divisors (see below), whose sum is σ = 157175148. Its totient is φ = 71976960.

The previous prime is 108389459. The next prime is 108389507. The reversal of 108389493 is 394983801.

108389493 is a `hidden beast` number, since 1 + 0 + 83 + 89 + 493 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 82410084 + 25979409 = 9078^2 + 5097^2 .

It is not a de Polignac number, because 108389493 - 2⁶ = 108389429 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108389453) 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, 21118 + ... + 25743.

It is an arithmetic number, because the mean of its divisors is an integer number (13097929).

Almost surely, 2^108389493 is an apocalyptic number.

It is an amenable number.

108389493 is a deficient number, since it is larger than the sum of its proper divisors (48785655).

108389493 is a wasteful number, since it uses less digits than its factorization.

108389493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47124 (or 47121 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 108389493 is about 10411.0274709080. The cubic root of 108389493 is about 476.7921117230.

The spelling of 108389493 in words is "one hundred eight million, three hundred eighty-nine thousand, four hundred ninety-three".