99518399 has 2 divisors, whose sum is σ = 99518400. Its totient is φ = 99518398.

The previous prime is 99518381. The next prime is 99518407. The reversal of 99518399 is 99381599.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99518399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99518399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99518359) 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, 49759199 + 49759200.

It is an arithmetic number, because the mean of its divisors is an integer number (49759200).

Almost surely, 2^99518399 is an apocalyptic number.

99518399 is a deficient number, since it is larger than the sum of its proper divisors (1).

99518399 is an equidigital number, since it uses as much as digits as its factorization.

99518399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 787320, while the sum is 53.

The square root of 99518399 is about 9975.8908875348. The cubic root of 99518399 is about 463.4125526893.

The spelling of 99518399 in words is "ninety-nine million, five hundred eighteen thousand, three hundred ninety-nine".