7973917 has 12 divisors (see below), whose sum is σ = 9322236. Its totient is φ = 6800640.

The previous prime is 7973899. The next prime is 7973921. The reversal of 7973917 is 7193797.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2893401 + 5080516 = 1701^2 + 2254^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7973917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7973117) 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 11 ways as a sum of consecutive naturals, for example, 17067 + ... + 17527.

It is an arithmetic number, because the mean of its divisors is an integer number (776853).

Almost surely, 2^7973917 is an apocalyptic number.

It is an amenable number.

7973917 is a deficient number, since it is larger than the sum of its proper divisors (1348319).

7973917 is a wasteful number, since it uses less digits than its factorization.

7973917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828 (or 821 counting only the distinct ones).

The product of its digits is 83349, while the sum is 43.

The square root of 7973917 is about 2823.8124937750. The cubic root of 7973917 is about 199.7824050146.

The spelling of 7973917 in words is "seven million, nine hundred seventy-three thousand, nine hundred seventeen".