9945047 has 4 divisors (see below), whose sum is σ = 11365776. Its totient is φ = 8524320.

The previous prime is 9945043. The next prime is 9945049. The reversal of 9945047 is 7405499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7405499 = 733 ⋅10103.

It is not a de Polignac number, because 9945047 - 2² = 9945043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9945047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9945043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 710354 + ... + 710367.

It is an arithmetic number, because the mean of its divisors is an integer number (2841444).

Almost surely, 2^9945047 is an apocalyptic number.

9945047 is a deficient number, since it is larger than the sum of its proper divisors (1420729).

9945047 is a wasteful number, since it uses less digits than its factorization.

9945047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420728.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 9945047 is about 3153.5768581089. The cubic root of 9945047 is about 215.0481017307.

The spelling of 9945047 in words is "nine million, nine hundred forty-five thousand, forty-seven".