108978693 has 4 divisors (see below), whose sum is σ = 145304928. Its totient is φ = 72652460.

The previous prime is 108978659. The next prime is 108978731. The reversal of 108978693 is 396879801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 108978693 - 2⁶ = 108978629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108978613) 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, 18163113 + ... + 18163118.

It is an arithmetic number, because the mean of its divisors is an integer number (36326232).

Almost surely, 2^108978693 is an apocalyptic number.

It is an amenable number.

108978693 is a deficient number, since it is larger than the sum of its proper divisors (36326235).

108978693 is an equidigital number, since it uses as much as digits as its factorization.

108978693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36326234.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 108978693 is about 10439.2860388055. The cubic root of 108978693 is about 477.6544905478.

The spelling of 108978693 in words is "one hundred eight million, nine hundred seventy-eight thousand, six hundred ninety-three".