8642869 has 8 divisors (see below), whose sum is σ = 8851032. Its totient is φ = 8436480.

The previous prime is 8642863. The next prime is 8642897. The reversal of 8642869 is 9682468.

It is a happy number.

8642869 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 16900 + 8625969 = 130^2 + 2937^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 8642869 - 2³ = 8642861 is a prime.

It is a super-2 number, since 2×8642869² = 149398369102322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8642861) 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, 16329 + ... + 16849.

It is an arithmetic number, because the mean of its divisors is an integer number (1106379).

Almost surely, 2^8642869 is an apocalyptic number.

It is an amenable number.

8642869 is a deficient number, since it is larger than the sum of its proper divisors (208163).

8642869 is a wasteful number, since it uses less digits than its factorization.

8642869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887.

The product of its digits is 165888, while the sum is 43.

The square root of 8642869 is about 2939.8756776435. The cubic root of 8642869 is about 205.2198236849.

The spelling of 8642869 in words is "eight million, six hundred forty-two thousand, eight hundred sixty-nine".