7117681 has 4 divisors (see below), whose sum is σ = 7134192. Its totient is φ = 7101172.

The previous prime is 7117667. The next prime is 7117697. The reversal of 7117681 is 1867117.

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-7117681 is a prime.

It is a super-2 number, since 2×7117681² = 101322765635522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7117081) 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, 7591 + ... + 8476.

It is an arithmetic number, because the mean of its divisors is an integer number (1783548).

Almost surely, 2^7117681 is an apocalyptic number.

It is an amenable number.

7117681 is a deficient number, since it is larger than the sum of its proper divisors (16511).

7117681 is a wasteful number, since it uses less digits than its factorization.

7117681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16510.

The product of its digits is 2352, while the sum is 31.

The square root of 7117681 is about 2667.8982364401. The cubic root of 7117681 is about 192.3591458504.

The spelling of 7117681 in words is "seven million, one hundred seventeen thousand, six hundred eighty-one".