107721609 has 8 divisors (see below), whose sum is σ = 143699712. Its totient is φ = 71778960.

The previous prime is 107721589. The next prime is 107721613. The reversal of 107721609 is 906127701.

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

It is not a de Polignac number, because 107721609 - 2⁵ = 107721577 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 107721609.

It is not an unprimeable number, because it can be changed into a prime (107721629) 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, 697 + ... + 14694.

It is an arithmetic number, because the mean of its divisors is an integer number (17962464).

Almost surely, 2^107721609 is an apocalyptic number.

It is an amenable number.

107721609 is a deficient number, since it is larger than the sum of its proper divisors (35978103).

107721609 is a wasteful number, since it uses less digits than its factorization.

107721609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17727.

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 107721609 is about 10378.9021095682. The cubic root of 107721609 is about 475.8107800155.

The spelling of 107721609 in words is "one hundred seven million, seven hundred twenty-one thousand, six hundred nine".