2639223 has 12 divisors (see below), whose sum is σ = 3953768. Its totient is φ = 1759320.

The previous prime is 2639213. The next prime is 2639239. The reversal of 2639223 is 3229362.

2639223 is a `hidden beast` number, since 2 + 639 + 2 + 23 = 666.

2639223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2639223 - 2⁴ = 2639207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 2 + 6 + 3⁵ + 9⁶ + 2¹³ + 2²¹ + 3⁷ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639213) 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 11 ways as a sum of consecutive naturals, for example, 5188 + ... + 5673.

2^2639223 is an apocalyptic number.

2639223 is a deficient number, since it is larger than the sum of its proper divisors (1314545).

2639223 is an equidigital number, since it uses as much as digits as its factorization.

2639223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10876 (or 10864 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 2639223 is about 1624.5685581101. The cubic root of 2639223 is about 138.1949041818.

The spelling of 2639223 in words is "two million, six hundred thirty-nine thousand, two hundred twenty-three".