9999745 has 8 divisors (see below), whose sum is σ = 13713984. Its totient is φ = 6856944.

The previous prime is 9999739. The next prime is 9999749. The reversal of 9999745 is 5479999.

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 9999745 - 2⁵ = 9999713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9999692 and 9999701.

It is not an unprimeable number, because it can be changed into a prime (9999749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142819 + ... + 142888.

It is an arithmetic number, because the mean of its divisors is an integer number (1714248).

Almost surely, 2^9999745 is an apocalyptic number.

It is an amenable number.

9999745 is a deficient number, since it is larger than the sum of its proper divisors (3714239).

9999745 is a wasteful number, since it uses less digits than its factorization.

9999745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285719.

The product of its digits is 918540, while the sum is 52.

The square root of 9999745 is about 3162.2373408712. The cubic root of 9999745 is about 215.4416377181.

The spelling of 9999745 in words is "nine million, nine hundred ninety-nine thousand, seven hundred forty-five".