99994249409 has 2 divisors, whose sum is σ = 99994249410. Its totient is φ = 99994249408.

The previous prime is 99994249349. The next prime is 99994249457. The reversal of 99994249409 is 90494249999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96909557809 + 3084691600 = 311303^2 + 55540^2 .

It is a cyclic number.

It is not a de Polignac number, because 99994249409 - 2¹² = 99994245313 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (99994249469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49997124704 + 49997124705.

It is an arithmetic number, because the mean of its divisors is an integer number (49997124705).

Almost surely, 2^99994249409 is an apocalyptic number.

It is an amenable number.

99994249409 is a deficient number, since it is larger than the sum of its proper divisors (1).

99994249409 is an equidigital number, since it uses as much as digits as its factorization.

99994249409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68024448, while the sum is 68.

The spelling of 99994249409 in words is "ninety-nine billion, nine hundred ninety-four million, two hundred forty-nine thousand, four hundred nine".