99000805 has 4 divisors (see below), whose sum is σ = 118800972. Its totient is φ = 79200640.

The previous prime is 99000793. The next prime is 99000817. The reversal of 99000805 is 50800099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50800099 = 7 ⋅7257157.

It is an interprime number because it is at equal distance from previous prime (99000793) and next prime (99000817).

It can be written as a sum of positive squares in 2 ways, for example, as 43020481 + 55980324 = 6559^2 + 7482^2 .

It is not a de Polignac number, because 99000805 - 2¹⁷ = 98869733 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9900076 + ... + 9900085.

It is an arithmetic number, because the mean of its divisors is an integer number (29700243).

Almost surely, 2^99000805 is an apocalyptic number.

It is an amenable number.

99000805 is a deficient number, since it is larger than the sum of its proper divisors (19800167).

99000805 is a wasteful number, since it uses less digits than its factorization.

99000805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19800166.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 99000805 is about 9949.9148237560. The cubic root of 99000805 is about 462.6077547810.

The spelling of 99000805 in words is "ninety-nine million, eight hundred five", and thus it is an aban number.