99416509 has 2 divisors, whose sum is σ = 99416510. Its totient is φ = 99416508.

The previous prime is 99416507. The next prime is 99416533. The reversal of 99416509 is 90561499.

99416509 is nontrivially palindromic in base 2.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81396484 + 18020025 = 9022^2 + 4245^2 .

It is a cyclic number.

It is not a de Polignac number, because 99416509 - 2¹ = 99416507 is a prime.

Together with 99416507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99416503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49708254 + 49708255.

It is an arithmetic number, because the mean of its divisors is an integer number (49708255).

Almost surely, 2^99416509 is an apocalyptic number.

It is an amenable number.

99416509 is a deficient number, since it is larger than the sum of its proper divisors (1).

99416509 is an equidigital number, since it uses as much as digits as its factorization.

99416509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 99416509 is about 9970.7827676667. The cubic root of 99416509 is about 463.2543466733.

The spelling of 99416509 in words is "ninety-nine million, four hundred sixteen thousand, five hundred nine".