2609653 has 4 divisors (see below), whose sum is σ = 2763180. Its totient is φ = 2456128.

The previous prime is 2609639. The next prime is 2609657. The reversal of 2609653 is 3569062.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1542564 + 1067089 = 1242^2 + 1033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2609653 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2609657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76738 + ... + 76771.

It is an arithmetic number, because the mean of its divisors is an integer number (690795).

2^2609653 is an apocalyptic number.

It is an amenable number.

2609653 is a deficient number, since it is larger than the sum of its proper divisors (153527).

2609653 is a wasteful number, since it uses less digits than its factorization.

2609653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153526.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 2609653 is about 1615.4420447667. The cubic root of 2609653 is about 137.6768501269.

The spelling of 2609653 in words is "two million, six hundred nine thousand, six hundred fifty-three".