108720321 has 8 divisors (see below), whose sum is σ = 153487584. Its totient is φ = 68216640.

The previous prime is 108720301. The next prime is 108720341. The reversal of 108720321 is 123027801.

It is an interprime number because it is at equal distance from previous prime (108720301) and next prime (108720341).

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

It is not a de Polignac number, because 108720321 - 2⁶ = 108720257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 108720291 and 108720300.

It is not an unprimeable number, because it can be changed into a prime (108720301) 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, 1065835 + ... + 1065936.

It is an arithmetic number, because the mean of its divisors is an integer number (19185948).

Almost surely, 2^108720321 is an apocalyptic number.

It is an amenable number.

108720321 is a deficient number, since it is larger than the sum of its proper divisors (44767263).

108720321 is a wasteful number, since it uses less digits than its factorization.

108720321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131791.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 108720321 is about 10426.9037110736. The cubic root of 108720321 is about 477.2767096497.

The spelling of 108720321 in words is "one hundred eight million, seven hundred twenty thousand, three hundred twenty-one".