109999709 has 2 divisors, whose sum is σ = 109999710. Its totient is φ = 109999708.

The previous prime is 109999667. The next prime is 109999723. The reversal of 109999709 is 907999901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99900025 + 10099684 = 9995^2 + 3178^2 .

It is a cyclic number.

It is not a de Polignac number, because 109999709 - 2¹⁶ = 109934173 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109999739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54999854 + 54999855.

It is an arithmetic number, because the mean of its divisors is an integer number (54999855).

Almost surely, 2^109999709 is an apocalyptic number.

It is an amenable number.

109999709 is a deficient number, since it is larger than the sum of its proper divisors (1).

109999709 is an equidigital number, since it uses as much as digits as its factorization.

109999709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 413343, while the sum is 53.

The square root of 109999709 is about 10488.0746088117. The cubic root of 109999709 is about 479.1415631898.

The spelling of 109999709 in words is "one hundred nine million, nine hundred ninety-nine thousand, seven hundred nine".