99318493 has 2 divisors, whose sum is σ = 99318494. Its totient is φ = 99318492.

The previous prime is 99318481. The next prime is 99318497. The reversal of 99318493 is 39481399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70190884 + 29127609 = 8378^2 + 5397^2 .

It is a cyclic number.

It is not a de Polignac number, because 99318493 - 2¹³ = 99310301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99318497) 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, 49659246 + 49659247.

It is an arithmetic number, because the mean of its divisors is an integer number (49659247).

Almost surely, 2^99318493 is an apocalyptic number.

It is an amenable number.

99318493 is a deficient number, since it is larger than the sum of its proper divisors (1).

99318493 is an equidigital number, since it uses as much as digits as its factorization.

99318493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 46.

The square root of 99318493 is about 9965.8663948500. The cubic root of 99318493 is about 463.1020538301.

The spelling of 99318493 in words is "ninety-nine million, three hundred eighteen thousand, four hundred ninety-three".