108921293 has 4 divisors (see below), whose sum is σ = 117299868. Its totient is φ = 100542720.

The previous prime is 108921289. The next prime is 108921299. The reversal of 108921293 is 392129801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65334889 + 43586404 = 8083^2 + 6602^2 .

It is a cyclic number.

It is not a de Polignac number, because 108921293 - 2² = 108921289 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 (108921299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4189268 + ... + 4189293.

It is an arithmetic number, because the mean of its divisors is an integer number (29324967).

Almost surely, 2^108921293 is an apocalyptic number.

108921293 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

108921293 is a deficient number, since it is larger than the sum of its proper divisors (8378575).

108921293 is an equidigital number, since it uses as much as digits as its factorization.

108921293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8378574.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 108921293 is about 10436.5364465420. The cubic root of 108921293 is about 477.5706142656.

The spelling of 108921293 in words is "one hundred eight million, nine hundred twenty-one thousand, two hundred ninety-three".