99813297 has 4 divisors (see below), whose sum is σ = 133084400. Its totient is φ = 66542196.

The previous prime is 99813293. The next prime is 99813299. The reversal of 99813297 is 79231899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79231899 = 3 ⋅26410633.

It is not a de Polignac number, because 99813297 - 2² = 99813293 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99813293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16635547 + ... + 16635552.

It is an arithmetic number, because the mean of its divisors is an integer number (33271100).

Almost surely, 2^99813297 is an apocalyptic number.

It is an amenable number.

99813297 is a deficient number, since it is larger than the sum of its proper divisors (33271103).

99813297 is a wasteful number, since it uses less digits than its factorization.

99813297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33271102.

The product of its digits is 244944, while the sum is 48.

The square root of 99813297 is about 9990.6604886764. The cubic root of 99813297 is about 463.8698372140.

The spelling of 99813297 in words is "ninety-nine million, eight hundred thirteen thousand, two hundred ninety-seven".