108720407 has 4 divisors (see below), whose sum is σ = 108741360. Its totient is φ = 108699456.

The previous prime is 108720401. The next prime is 108720427. The reversal of 108720407 is 704027801.

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 108720407 - 2⁶ = 108720343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 108720407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108720401) 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, 3719 + ... + 15207.

It is an arithmetic number, because the mean of its divisors is an integer number (27185340).

Almost surely, 2^108720407 is an apocalyptic number.

108720407 is a deficient number, since it is larger than the sum of its proper divisors (20953).

108720407 is an equidigital number, since it uses as much as digits as its factorization.

108720407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20952.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 108720407 is about 10426.9078350199. The cubic root of 108720407 is about 477.2768354949.

The spelling of 108720407 in words is "one hundred eight million, seven hundred twenty thousand, four hundred seven".