8423689 has 8 divisors (see below), whose sum is σ = 8591400. Its totient is φ = 8257536.

The previous prime is 8423683. The next prime is 8423699. The reversal of 8423689 is 9863248.

It can be written as a sum of positive squares in 4 ways, for example, as 4443664 + 3980025 = 2108^2 + 1995^2 .

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

It is a 6-Lehmer number, since φ(8423689) divides (8423689-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 8423689 - 2¹¹ = 8421641 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8423683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18537 + ... + 18985.

It is an arithmetic number, because the mean of its divisors is an integer number (1073925).

Almost surely, 2^8423689 is an apocalyptic number.

It is an amenable number.

8423689 is a deficient number, since it is larger than the sum of its proper divisors (167711).

8423689 is a wasteful number, since it uses less digits than its factorization.

8423689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779.

The product of its digits is 82944, while the sum is 40.

The square root of 8423689 is about 2902.3592127785. The cubic root of 8423689 is about 203.4701825929.

The spelling of 8423689 in words is "eight million, four hundred twenty-three thousand, six hundred eighty-nine".