2639653 has 8 divisors (see below), whose sum is σ = 2714360. Its totient is φ = 2566080.

The previous prime is 2639639. The next prime is 2639669. The reversal of 2639653 is 3569362.

It can be written as a sum of positive squares in 4 ways, for example, as 199809 + 2439844 = 447^2 + 1562^2 .

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 2639653 - 2¹⁷ = 2508581 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 (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, 6451 + ... + 6847.

It is an arithmetic number, because the mean of its divisors is an integer number (339295).

2^2639653 is an apocalyptic number.

It is an amenable number.

2639653 is a deficient number, since it is larger than the sum of its proper divisors (74707).

2639653 is a wasteful number, since it uses less digits than its factorization.

2639653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567.

The product of its digits is 29160, while the sum is 34.

The square root of 2639653 is about 1624.7008955497. The cubic root of 2639653 is about 138.2024089893.

The spelling of 2639653 in words is "two million, six hundred thirty-nine thousand, six hundred fifty-three".