107868721 has 4 divisors (see below), whose sum is σ = 107894052. Its totient is φ = 107843392.

The previous prime is 107868703. The next prime is 107868743. The reversal of 107868721 is 127868701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 127868701 = 53 ⋅2412617.

It can be written as a sum of positive squares in 2 ways, for example, as 5130225 + 102738496 = 2265^2 + 10136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-107868721 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (107868701) 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, 4540 + ... + 15373.

It is an arithmetic number, because the mean of its divisors is an integer number (26973513).

Almost surely, 2^107868721 is an apocalyptic number.

It is an amenable number.

107868721 is a deficient number, since it is larger than the sum of its proper divisors (25331).

107868721 is an equidigital number, since it uses as much as digits as its factorization.

107868721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25330.

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 107868721 is about 10385.9867610160. The cubic root of 107868721 is about 476.0272814084.

The spelling of 107868721 in words is "one hundred seven million, eight hundred sixty-eight thousand, seven hundred twenty-one".