7869 has 8 divisors (see below), whose sum is σ = 10912. Its totient is φ = 5040.

The previous prime is 7867. The next prime is 7873. The reversal of 7869 is 9687.

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 7869 - 2¹ = 7867 is a prime.

It is a super-2 number, since 2×7869² = 123842322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7867) 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, 99 + ... + 159.

It is an arithmetic number, because the mean of its divisors is an integer number (1364).

2⁷⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

7869 is a deficient number, since it is larger than the sum of its proper divisors (3043).

7869 is a wasteful number, since it uses less digits than its factorization.

7869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107.

The product of its digits is 3024, while the sum is 30.

The square root of 7869 is about 88.7073841346. The cubic root of 7869 is about 19.8902319846.

The spelling of 7869 in words is "seven thousand, eight hundred sixty-nine".