99981233 has 8 divisors (see below), whose sum is σ = 115486560. Its totient is φ = 85545280.

The previous prime is 99981229. The next prime is 99981251. The reversal of 99981233 is 33218999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99981233 - 2² = 99981229 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99986233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267143 + ... + 267516.

It is an arithmetic number, because the mean of its divisors is an integer number (14435820).

Almost surely, 2^99981233 is an apocalyptic number.

It is an amenable number.

99981233 is a deficient number, since it is larger than the sum of its proper divisors (15505327).

99981233 is a wasteful number, since it uses less digits than its factorization.

99981233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534687.

The product of its digits is 104976, while the sum is 44.

The square root of 99981233 is about 9999.0616059708. The cubic root of 99981233 is about 464.1298453121.

The spelling of 99981233 in words is "ninety-nine million, nine hundred eighty-one thousand, two hundred thirty-three".