108972409 has 16 divisors (see below), whose sum is σ = 138449920. Its totient is φ = 83436480.

The previous prime is 108972407. The next prime is 108972463. The reversal of 108972409 is 904279801.

It is a cyclic number.

It is not a de Polignac number, because 108972409 - 2¹ = 108972407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (108972407) 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 15 ways as a sum of consecutive naturals, for example, 16494 + ... + 22135.

It is an arithmetic number, because the mean of its divisors is an integer number (8653120).

Almost surely, 2^108972409 is an apocalyptic number.

It is an amenable number.

108972409 is a deficient number, since it is larger than the sum of its proper divisors (29477511).

108972409 is a wasteful number, since it uses less digits than its factorization.

108972409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38680.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 108972409 is about 10438.9850560292. The cubic root of 108972409 is about 477.6453094304.

The spelling of 108972409 in words is "one hundred eight million, nine hundred seventy-two thousand, four hundred nine".