2656869 has 4 divisors (see below), whose sum is σ = 3542496. Its totient is φ = 1771244.

The previous prime is 2656867. The next prime is 2656877. The reversal of 2656869 is 9686562.

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 2656869 - 2¹ = 2656867 is a prime.

It is a super-2 number, since 2×2656869² = 14117905766322, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2656869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442809 + ... + 442814.

It is an arithmetic number, because the mean of its divisors is an integer number (885624).

2^2656869 is an apocalyptic number.

It is an amenable number.

2656869 is a deficient number, since it is larger than the sum of its proper divisors (885627).

2656869 is an equidigital number, since it uses as much as digits as its factorization.

2656869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885626.

The product of its digits is 155520, while the sum is 42.

The square root of 2656869 is about 1629.9904907698. The cubic root of 2656869 is about 138.5022133824.

The spelling of 2656869 in words is "two million, six hundred fifty-six thousand, eight hundred sixty-nine".