2636789 has 4 divisors (see below), whose sum is σ = 2751456. Its totient is φ = 2522124.

The previous prime is 2636779. The next prime is 2636791. The reversal of 2636789 is 9876362.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9876362 = 2 ⋅4938181.

It is a cyclic number.

It is not a de Polignac number, because 2636789 - 2⁴ = 2636773 is a prime.

It is a d-powerful number, because it can be written as 2⁵ + 6² + 3¹² + 6⁵ + 7³ + 8⁷ + 9 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2636719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57299 + ... + 57344.

It is an arithmetic number, because the mean of its divisors is an integer number (687864).

2^2636789 is an apocalyptic number.

It is an amenable number.

2636789 is a deficient number, since it is larger than the sum of its proper divisors (114667).

2636789 is a wasteful number, since it uses less digits than its factorization.

2636789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114666.

The product of its digits is 108864, while the sum is 41.

The square root of 2636789 is about 1623.8192633418. The cubic root of 2636789 is about 138.1524081071.

The spelling of 2636789 in words is "two million, six hundred thirty-six thousand, seven hundred eighty-nine".