108978018973 has 4 divisors (see below), whose sum is σ = 108995610780. Its totient is φ = 108960427168.

The previous prime is 108978018949. The next prime is 108978018979. The reversal of 108978018973 is 379810879801.

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 43709010489 + 65269008484 = 209067^2 + 255478^2 .

It is a cyclic number.

It is not a de Polignac number, because 108978018973 - 2²⁹ = 108441148061 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 (108978018979) 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, 8786608 + ... + 8799001.

It is an arithmetic number, because the mean of its divisors is an integer number (27248902695).

Almost surely, 2^108978018973 is an apocalyptic number.

It is an amenable number.

108978018973 is a deficient number, since it is larger than the sum of its proper divisors (17591807).

108978018973 is an equidigital number, since it uses as much as digits as its factorization.

108978018973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17591806.

The product of its (nonzero) digits is 6096384, while the sum is 61.

The spelling of 108978018973 in words is "one hundred eight billion, nine hundred seventy-eight million, eighteen thousand, nine hundred seventy-three".