9999445 has 4 divisors (see below), whose sum is σ = 11999340. Its totient is φ = 7999552.

The previous prime is 9999433. The next prime is 9999463. The reversal of 9999445 is 5449999.

9999445 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5449999 = 29 ⋅187931.

It can be written as a sum of positive squares in 2 ways, for example, as 4036081 + 5963364 = 2009^2 + 2442^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999445 - 2⁷ = 9999317 is a prime.

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, 999940 + ... + 999949.

It is an arithmetic number, because the mean of its divisors is an integer number (2999835).

Almost surely, 2^9999445 is an apocalyptic number.

It is an amenable number.

9999445 is a deficient number, since it is larger than the sum of its proper divisors (1999895).

9999445 is a wasteful number, since it uses less digits than its factorization.

9999445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999894.

The product of its digits is 524880, while the sum is 49.

The square root of 9999445 is about 3162.1899057457. The cubic root of 9999445 is about 215.4394832253.

The spelling of 9999445 in words is "nine million, nine hundred ninety-nine thousand, four hundred forty-five".