108609999 has 8 divisors (see below), whose sum is σ = 145377840. Its totient is φ = 72124416.

The previous prime is 108609989. The next prime is 108610031. The reversal of 108609999 is 999906801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 108609999 - 2¹⁷ = 108478927 is a prime.

It is a super-2 number, since 2×108609999² = 23592263765560002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108609989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69664 + ... + 71205.

It is an arithmetic number, because the mean of its divisors is an integer number (18172230).

Almost surely, 2^108609999 is an apocalyptic number.

108609999 is a deficient number, since it is larger than the sum of its proper divisors (36767841).

108609999 is a wasteful number, since it uses less digits than its factorization.

108609999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141129.

The product of its (nonzero) digits is 314928, while the sum is 51.

The square root of 108609999 is about 10421.6121113770. The cubic root of 108609999 is about 477.1152190143.

The spelling of 108609999 in words is "one hundred eight million, six hundred nine thousand, nine hundred ninety-nine".