108453993 has 24 divisors (see below), whose sum is σ = 155335488. Its totient is φ = 67253472.

The previous prime is 108453967. The next prime is 108454009. The reversal of 108453993 is 399354801.

It is not a de Polignac number, because 108453993 - 2²⁴ = 91676777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (108453923) 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, 57796 + ... + 59642.

It is an arithmetic number, because the mean of its divisors is an integer number (6472312).

Almost surely, 2^108453993 is an apocalyptic number.

It is an amenable number.

108453993 is a deficient number, since it is larger than the sum of its proper divisors (46881495).

108453993 is a wasteful number, since it uses less digits than its factorization.

108453993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933 (or 1910 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 108453993 is about 10414.1246871737. The cubic root of 108453993 is about 476.8866688375.

The spelling of 108453993 in words is "one hundred eight million, four hundred fifty-three thousand, nine hundred ninety-three".