107719921 has 2 divisors, whose sum is σ = 107719922. Its totient is φ = 107719920.

The previous prime is 107719907. The next prime is 107719933. The reversal of 107719921 is 129917701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57153600 + 50566321 = 7560^2 + 7111^2 .

It is a cyclic number.

It is not a de Polignac number, because 107719921 - 2⁷ = 107719793 is a prime.

It is not a weakly prime, because it can be changed into another prime (107719981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53859960 + 53859961.

It is an arithmetic number, because the mean of its divisors is an integer number (53859961).

Almost surely, 2^107719921 is an apocalyptic number.

It is an amenable number.

107719921 is a deficient number, since it is larger than the sum of its proper divisors (1).

107719921 is an equidigital number, since it uses as much as digits as its factorization.

107719921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 37.

The square root of 107719921 is about 10378.8207904366. The cubic root of 107719921 is about 475.8082946807.

The spelling of 107719921 in words is "one hundred seven million, seven hundred nineteen thousand, nine hundred twenty-one".