99309490409 has 2 divisors, whose sum is σ = 99309490410. Its totient is φ = 99309490408.

The previous prime is 99309490391. The next prime is 99309490411. The reversal of 99309490409 is 90409490399.

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., 83953324009 + 15356166400 = 289747^2 + 123920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99309490409 is a prime.

Together with 99309490411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99309490439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49654745204 + 49654745205.

It is an arithmetic number, because the mean of its divisors is an integer number (49654745205).

Almost surely, 2^99309490409 is an apocalyptic number.

It is an amenable number.

99309490409 is a deficient number, since it is larger than the sum of its proper divisors (1).

99309490409 is an equidigital number, since it uses as much as digits as its factorization.

99309490409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2834352, while the sum is 56.

The spelling of 99309490409 in words is "ninety-nine billion, three hundred nine million, four hundred ninety thousand, four hundred nine".