9945998 has 4 divisors (see below), whose sum is σ = 14919000. Its totient is φ = 4972998.

The previous prime is 9945997. The next prime is 9946039. The reversal of 9945998 is 8995499.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9945997) 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 as a sum of consecutive naturals, namely, 2486498 + ... + 2486501.

It is an arithmetic number, because the mean of its divisors is an integer number (3729750).

Almost surely, 2^9945998 is an apocalyptic number.

9945998 is a deficient number, since it is larger than the sum of its proper divisors (4973002).

9945998 is a wasteful number, since it uses less digits than its factorization.

9945998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4973001.

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

The square root of 9945998 is about 3153.7276356718. The cubic root of 9945998 is about 215.0549562056.

The spelling of 9945998 in words is "nine million, nine hundred forty-five thousand, nine hundred ninety-eight".