99996409 has 2 divisors, whose sum is σ = 99996410. Its totient is φ = 99996408.

The previous prime is 99996389. The next prime is 99996419. The reversal of 99996409 is 90469999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93605625 + 6390784 = 9675^2 + 2528^2 .

It is an emirp because it is prime and its reverse (90469999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99996409 - 2¹¹ = 99994361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99996409.

It is not a weakly prime, because it can be changed into another prime (99996419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49998204 + 49998205.

It is an arithmetic number, because the mean of its divisors is an integer number (49998205).

Almost surely, 2^99996409 is an apocalyptic number.

It is an amenable number.

99996409 is a deficient number, since it is larger than the sum of its proper divisors (1).

99996409 is an equidigital number, since it uses as much as digits as its factorization.

99996409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1417176, while the sum is 55.

The square root of 99996409 is about 9999.8204483881. The cubic root of 99996409 is about 464.1533273129.

The spelling of 99996409 in words is "ninety-nine million, nine hundred ninety-six thousand, four hundred nine".