2656989 has 8 divisors (see below), whose sum is σ = 3936320. Its totient is φ = 1771308.

The previous prime is 2656987. The next prime is 2656991. The reversal of 2656989 is 9896562.

2656989 is a `hidden beast` number, since 2 + 6 + 569 + 89 = 666.

2656989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2656987) and next prime (2656991).

It is not a de Polignac number, because 2656989 - 2¹ = 2656987 is a prime.

It is a super-2 number, since 2×2656989² = 14119181092242, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656987) 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, 49177 + ... + 49230.

It is an arithmetic number, because the mean of its divisors is an integer number (492040).

2^2656989 is an apocalyptic number.

It is an amenable number.

2656989 is a deficient number, since it is larger than the sum of its proper divisors (1279331).

2656989 is an equidigital number, since it uses as much as digits as its factorization.

2656989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98416 (or 98410 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 2656989 is about 1630.0273003849. The cubic root of 2656989 is about 138.5042985455.

The spelling of 2656989 in words is "two million, six hundred fifty-six thousand, nine hundred eighty-nine".