99318973 has 4 divisors (see below), whose sum is σ = 106958908. Its totient is φ = 91679040.

The previous prime is 99318941. The next prime is 99319013. The reversal of 99318973 is 37981399.

99318973 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37981399 = 19 ⋅1999021.

It can be written as a sum of positive squares in 2 ways, for example, as 68260644 + 31058329 = 8262^2 + 5573^2 .

It is a cyclic number.

It is not a de Polignac number, because 99318973 - 2⁵ = 99318941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99318173) 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 in 3 ways as a sum of consecutive naturals, for example, 3819948 + ... + 3819973.

It is an arithmetic number, because the mean of its divisors is an integer number (26739727).

Almost surely, 2^99318973 is an apocalyptic number.

It is an amenable number.

99318973 is a deficient number, since it is larger than the sum of its proper divisors (7639935).

99318973 is a wasteful number, since it uses less digits than its factorization.

99318973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7639934.

The product of its digits is 367416, while the sum is 49.

The square root of 99318973 is about 9965.8904770221. The cubic root of 99318973 is about 463.1027998766.

The spelling of 99318973 in words is "ninety-nine million, three hundred eighteen thousand, nine hundred seventy-three".