2662639 has 4 divisors (see below), whose sum is σ = 3043024. Its totient is φ = 2282256.

The previous prime is 2662607. The next prime is 2662651. The reversal of 2662639 is 9362662.

2662639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2662639 - 2⁵ = 2662607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2662669) 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 3 ways as a sum of consecutive naturals, for example, 190182 + ... + 190195.

It is an arithmetic number, because the mean of its divisors is an integer number (760756).

2^2662639 is an apocalyptic number.

2662639 is a deficient number, since it is larger than the sum of its proper divisors (380385).

2662639 is an equidigital number, since it uses as much as digits as its factorization.

2662639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380384.

The product of its digits is 23328, while the sum is 34.

The square root of 2662639 is about 1631.7594798254. The cubic root of 2662639 is about 138.6024039890.

The spelling of 2662639 in words is "two million, six hundred sixty-two thousand, six hundred thirty-nine".