7920117 has 12 divisors (see below), whose sum is σ = 11554764. Its totient is φ = 5227200.

The previous prime is 7920091. The next prime is 7920139. The reversal of 7920117 is 7110297.

It can be written as a sum of positive squares in 2 ways, for example, as 7650756 + 269361 = 2766^2 + 519^2 .

It is not a de Polignac number, because 7920117 - 2⁶ = 7920053 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7920217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3448 + ... + 5265.

It is an arithmetic number, because the mean of its divisors is an integer number (962897).

Almost surely, 2^7920117 is an apocalyptic number.

It is an amenable number.

7920117 is a deficient number, since it is larger than the sum of its proper divisors (3634647).

7920117 is a wasteful number, since it uses less digits than its factorization.

7920117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8820 (or 8817 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 27.

The square root of 7920117 is about 2814.2702428871. The cubic root of 7920117 is about 199.3320802323.

The spelling of 7920117 in words is "seven million, nine hundred twenty thousand, one hundred seventeen".