108615399 has 4 divisors (see below), whose sum is σ = 144820536. Its totient is φ = 72410264.

The previous prime is 108615383. The next prime is 108615421. The reversal of 108615399 is 993516801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993516801 = 3 ⋅331172267.

It is a cyclic number.

It is not a de Polignac number, because 108615399 - 2⁴ = 108615383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 108615399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108615349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18102564 + ... + 18102569.

It is an arithmetic number, because the mean of its divisors is an integer number (36205134).

Almost surely, 2^108615399 is an apocalyptic number.

108615399 is a deficient number, since it is larger than the sum of its proper divisors (36205137).

108615399 is an equidigital number, since it uses as much as digits as its factorization.

108615399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36205136.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 108615399 is about 10421.8711851567. The cubic root of 108615399 is about 477.1231261423.

The spelling of 108615399 in words is "one hundred eight million, six hundred fifteen thousand, three hundred ninety-nine".