8661693 has 8 divisors (see below), whose sum is σ = 11721568. Its totient is φ = 5688144.

The previous prime is 8661689. The next prime is 8661703. The reversal of 8661693 is 3961668.

It is a happy number.

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

It is not a de Polignac number, because 8661693 - 2² = 8661689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8661623) 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 7 ways as a sum of consecutive naturals, for example, 21346 + ... + 21747.

It is an arithmetic number, because the mean of its divisors is an integer number (1465196).

Almost surely, 2^8661693 is an apocalyptic number.

It is an amenable number.

8661693 is a deficient number, since it is larger than the sum of its proper divisors (3059875).

8661693 is a wasteful number, since it uses less digits than its factorization.

8661693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43163.

The product of its digits is 46656, while the sum is 39.

The square root of 8661693 is about 2943.0754322647. The cubic root of 8661693 is about 205.3687039080.

The spelling of 8661693 in words is "eight million, six hundred sixty-one thousand, six hundred ninety-three".