99799709 has 2 divisors, whose sum is σ = 99799710. Its totient is φ = 99799708.

The previous prime is 99799703. The next prime is 99799729. The reversal of 99799709 is 90799799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87703225 + 12096484 = 9365^2 + 3478^2 .

It is an emirp because it is prime and its reverse (90799799) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99799709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99799703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49899854 + 49899855.

It is an arithmetic number, because the mean of its divisors is an integer number (49899855).

Almost surely, 2^99799709 is an apocalyptic number.

It is an amenable number.

99799709 is a deficient number, since it is larger than the sum of its proper divisors (1).

99799709 is an equidigital number, since it uses as much as digits as its factorization.

99799709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2893401, while the sum is 59.

The square root of 99799709 is about 9989.9804304113. The cubic root of 99799709 is about 463.8487867475.

The spelling of 99799709 in words is "ninety-nine million, seven hundred ninety-nine thousand, seven hundred nine".