7381689 has 64 divisors (see below), whose sum is σ = 13271040. Its totient is φ = 3548160.

The previous prime is 7381663. The next prime is 7381691. The reversal of 7381689 is 9861837.

It is not a de Polignac number, because 7381689 - 2⁸ = 7381433 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7381689.

It is not an unprimeable number, because it can be changed into a prime (7381639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 238104 + ... + 238134.

It is an arithmetic number, because the mean of its divisors is an integer number (207360).

Almost surely, 2^7381689 is an apocalyptic number.

It is an amenable number.

7381689 is a deficient number, since it is larger than the sum of its proper divisors (5889351).

7381689 is a wasteful number, since it uses less digits than its factorization.

7381689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110.

The product of its digits is 72576, while the sum is 42.

The square root of 7381689 is about 2716.9263884029. The cubic root of 7381689 is about 194.7086510407.

The spelling of 7381689 in words is "seven million, three hundred eighty-one thousand, six hundred eighty-nine".