9791947 has 4 divisors (see below), whose sum is σ = 10682136. Its totient is φ = 8901760.

The previous prime is 9791941. The next prime is 9791953. The reversal of 9791947 is 7491979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7491979 = 11 ⋅681089.

It is an interprime number because it is at equal distance from previous prime (9791941) and next prime (9791953).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9791947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9791897 and 9791906.

It is not an unprimeable number, because it can be changed into a prime (9791941) 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 in 3 ways as a sum of consecutive naturals, for example, 445078 + ... + 445099.

It is an arithmetic number, because the mean of its divisors is an integer number (2670534).

Almost surely, 2^9791947 is an apocalyptic number.

9791947 is a deficient number, since it is larger than the sum of its proper divisors (890189).

9791947 is a wasteful number, since it uses less digits than its factorization.

9791947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890188.

The product of its digits is 142884, while the sum is 46.

The square root of 9791947 is about 3129.2086859141. The cubic root of 9791947 is about 213.9388636610.

Subtracting from 9791947 its reverse (7491979), we obtain a cube (2299968 = 132³).

It can be divided in two parts, 979 and 1947, that added together give a triangular number (2926 = T₇₆).

The spelling of 9791947 in words is "nine million, seven hundred ninety-one thousand, nine hundred forty-seven".