99743309 has 2 divisors, whose sum is σ = 99743310. Its totient is φ = 99743308.

The previous prime is 99743291. The next prime is 99743321. The reversal of 99743309 is 90334799.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85470025 + 14273284 = 9245^2 + 3778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99743309 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99743309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99743389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49871654 + 49871655.

It is an arithmetic number, because the mean of its divisors is an integer number (49871655).

Almost surely, 2^99743309 is an apocalyptic number.

It is an amenable number.

99743309 is a deficient number, since it is larger than the sum of its proper divisors (1).

99743309 is an equidigital number, since it uses as much as digits as its factorization.

99743309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 99743309 is about 9987.1572031284. The cubic root of 99743309 is about 463.7613916988.

The spelling of 99743309 in words is "ninety-nine million, seven hundred forty-three thousand, three hundred nine".