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8869 = 72181

8869 has 6 divisors (see below), whose sum is σ = 10374. Its totient is φ = 7560.

The previous prime is 8867. The next prime is 8887. The reversal of 8869 is 9688.

It can be written as a sum of positive squares in only one way, i.e., 4900 + 3969 = 70^2 + 63^2 .

It is not a de Polignac number, because 8869 - 21 = 8867 is a prime.

It is a super-2 number, since 2×88692 = 157318322, which contains 22 as substring.

8869 is a lucky number.

It is a plaindrome in base 14.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 8869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42 + ... + 139.

It is an arithmetic number, because the mean of its divisors is an integer number (1729).

28869 is an apocalyptic number.

It is an amenable number.

8869 is a deficient number, since it is larger than the sum of its proper divisors (1505).

8869 is a wasteful number, since it uses less digits than its factorization.

8869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 188 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 8869 is about 94.1753683295. The cubic root of 8869 is about 20.6994219852.

The spelling of 8869 in words is "eight thousand, eight hundred sixty-nine".

Divisors: 1 7 49 181 1267 8869