99991333 has 16 divisors (see below), whose sum is σ = 114130800. Its totient is φ = 86929920.

The previous prime is 99991303. The next prime is 99991343. The reversal of 99991333 is 33319999.

It can be written as a sum of positive squares in 8 ways, for example, as 45792289 + 54199044 = 6767^2 + 7362^2 .

It is a cyclic number.

It is not a de Polignac number, because 99991333 - 2¹³ = 99983141 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 (99991303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12223 + ... + 18691.

It is an arithmetic number, because the mean of its divisors is an integer number (7133175).

Almost surely, 2^99991333 is an apocalyptic number.

It is an amenable number.

99991333 is a deficient number, since it is larger than the sum of its proper divisors (14139467).

99991333 is a wasteful number, since it uses less digits than its factorization.

99991333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6552.

The product of its digits is 177147, while the sum is 46.

The square root of 99991333 is about 9999.5666406100. The cubic root of 99991333 is about 464.1454734237.

The spelling of 99991333 in words is "ninety-nine million, nine hundred ninety-one thousand, three hundred thirty-three".