107721613 has 2 divisors, whose sum is σ = 107721614. Its totient is φ = 107721612.

The previous prime is 107721589. The next prime is 107721617. The reversal of 107721613 is 316127701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81486729 + 26234884 = 9027^2 + 5122^2 .

It is a cyclic number.

It is not a de Polignac number, because 107721613 - 2⁹ = 107721101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (107721617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53860806 + 53860807.

It is an arithmetic number, because the mean of its divisors is an integer number (53860807).

Almost surely, 2^107721613 is an apocalyptic number.

It is an amenable number.

107721613 is a deficient number, since it is larger than the sum of its proper divisors (1).

107721613 is an equidigital number, since it uses as much as digits as its factorization.

107721613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 107721613 is about 10378.9023022668. The cubic root of 107721613 is about 475.8107859049.

The spelling of 107721613 in words is "one hundred seven million, seven hundred twenty-one thousand, six hundred thirteen".