9945899 has 4 divisors (see below), whose sum is σ = 10012800. Its totient is φ = 9879000.

The previous prime is 9945889. The next prime is 9945919. The reversal of 9945899 is 9985499.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9945899 - 2⁴ = 9945883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9945899.

It is not an unprimeable number, because it can be changed into a prime (9945889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33227 + ... + 33524.

It is an arithmetic number, because the mean of its divisors is an integer number (2503200).

Almost surely, 2^9945899 is an apocalyptic number.

9945899 is a deficient number, since it is larger than the sum of its proper divisors (66901).

9945899 is a wasteful number, since it uses less digits than its factorization.

9945899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66900.

The product of its digits is 1049760, while the sum is 53.

The square root of 9945899 is about 3153.7119399210. The cubic root of 9945899 is about 215.0542426687.

The spelling of 9945899 in words is "nine million, nine hundred forty-five thousand, eight hundred ninety-nine".