108378815 has 4 divisors (see below), whose sum is σ = 130054584. Its totient is φ = 86703048.

The previous prime is 108378797. The next prime is 108378817. The reversal of 108378815 is 518873801.

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

It is a cyclic number.

It is not a de Polignac number, because 108378815 - 2¹² = 108374719 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 (108378817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10837877 + ... + 10837886.

It is an arithmetic number, because the mean of its divisors is an integer number (32513646).

Almost surely, 2^108378815 is an apocalyptic number.

108378815 is a deficient number, since it is larger than the sum of its proper divisors (21675769).

108378815 is an equidigital number, since it uses as much as digits as its factorization.

108378815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21675768.

The product of its (nonzero) digits is 53760, while the sum is 41.

The square root of 108378815 is about 10410.5146366546. The cubic root of 108378815 is about 476.7764541372.

The spelling of 108378815 in words is "one hundred eight million, three hundred seventy-eight thousand, eight hundred fifteen".