2869 has 4 divisors (see below), whose sum is σ = 3040. Its totient is φ = 2700.

The previous prime is 2861. The next prime is 2879. The reversal of 2869 is 9682.

2869 = T₇ + T₈ + ... + T₂₅.

2869 = 2² + 3² + ... + 20².

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2869 - 2³ = 2861 is a prime.

It is a super-2 number, since 2×2869² = 16462322, which contains 22 as substring.

It is a plaindrome in base 7.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57 + ... + 94.

It is an arithmetic number, because the mean of its divisors is an integer number (760).

It is an amenable number.

2869 is a deficient number, since it is larger than the sum of its proper divisors (171).

2869 is a wasteful number, since it uses less digits than its factorization.

2869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170.

The product of its digits is 864, while the sum is 25.

The square root of 2869 is about 53.5630469634. The cubic root of 2869 is about 14.2094362988.

The spelling of 2869 in words is "two thousand, eight hundred sixty-nine".