9999747 has 16 divisors (see below), whose sum is σ = 14868480. Its totient is φ = 6642216.

The previous prime is 9999739. The next prime is 9999749. The reversal of 9999747 is 7479999.

It is not a de Polignac number, because 9999747 - 2³ = 9999739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9999693 and 9999702.

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 15 ways as a sum of consecutive naturals, for example, 9858 + ... + 10824.

It is an arithmetic number, because the mean of its divisors is an integer number (929280).

Almost surely, 2^9999747 is an apocalyptic number.

9999747 is a deficient number, since it is larger than the sum of its proper divisors (4868733).

9999747 is a wasteful number, since it uses less digits than its factorization.

9999747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359 (or 1353 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 9999747 is about 3162.2376571030. The cubic root of 9999747 is about 215.4416520813.

The spelling of 9999747 in words is "nine million, nine hundred ninety-nine thousand, seven hundred forty-seven".