7189681 has 8 divisors (see below), whose sum is σ = 7356960. Its totient is φ = 7024032.

The previous prime is 7189669. The next prime is 7189717. The reversal of 7189681 is 1869817.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 3-Lehmer number, since φ(7189681) divides (7189681-1)³.

It is a cyclic number.

It is not a de Polignac number, because 7189681 - 2⁵ = 7189649 is a prime.

It is a super-2 number, since 2×7189681² = 103383025763522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7189661) 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 7 ways as a sum of consecutive naturals, for example, 13486 + ... + 14008.

It is an arithmetic number, because the mean of its divisors is an integer number (919620).

Almost surely, 2^7189681 is an apocalyptic number.

It is an amenable number.

7189681 is a deficient number, since it is larger than the sum of its proper divisors (167279).

7189681 is a wasteful number, since it uses less digits than its factorization.

7189681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815.

The product of its digits is 24192, while the sum is 40.

The square root of 7189681 is about 2681.3580514359. The cubic root of 7189681 is about 193.0055838810.

The spelling of 7189681 in words is "seven million, one hundred eighty-nine thousand, six hundred eighty-one".