7897117 has 4 divisors (see below), whose sum is σ = 8008416. Its totient is φ = 7785820.

The previous prime is 7897063. The next prime is 7897147. The reversal of 7897117 is 7117987.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7897117 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 7897117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7897147) 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, 55543 + ... + 55684.

It is an arithmetic number, because the mean of its divisors is an integer number (2002104).

Almost surely, 2^7897117 is an apocalyptic number.

It is an amenable number.

7897117 is a deficient number, since it is larger than the sum of its proper divisors (111299).

7897117 is a wasteful number, since it uses less digits than its factorization.

7897117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111298.

The product of its digits is 24696, while the sum is 40.

The square root of 7897117 is about 2810.1809550276. The cubic root of 7897117 is about 199.1389398640.

The spelling of 7897117 in words is "seven million, eight hundred ninety-seven thousand, one hundred seventeen".