2639623 has 8 divisors (see below), whose sum is σ = 3026592. Its totient is φ = 2255136.

The previous prime is 2639597. The next prime is 2639633. The reversal of 2639623 is 3269362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2639623 - 2⁹ = 2639111 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 6⁴ + 3 + 9⁶ + 6⁴ + 2²¹ + 3⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3561 + ... + 4237.

It is an arithmetic number, because the mean of its divisors is an integer number (378324).

2^2639623 is an apocalyptic number.

2639623 is a deficient number, since it is larger than the sum of its proper divisors (386969).

2639623 is an equidigital number, since it uses as much as digits as its factorization.

2639623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241.

The product of its digits is 11664, while the sum is 31.

The square root of 2639623 is about 1624.6916630549. The cubic root of 2639623 is about 138.2018854245.

The spelling of 2639623 in words is "two million, six hundred thirty-nine thousand, six hundred twenty-three".