2609591 has 4 divisors (see below), whose sum is σ = 2636592. Its totient is φ = 2582592.

The previous prime is 2609587. The next prime is 2609597. The reversal of 2609591 is 1959062.

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 2609591 - 2² = 2609587 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 (2609597) 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, 13355 + ... + 13548.

It is an arithmetic number, because the mean of its divisors is an integer number (659148).

2^2609591 is an apocalyptic number.

2609591 is a deficient number, since it is larger than the sum of its proper divisors (27001).

2609591 is an equidigital number, since it uses as much as digits as its factorization.

2609591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27000.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 2609591 is about 1615.4228548588. The cubic root of 2609591 is about 137.6757598117.

The spelling of 2609591 in words is "two million, six hundred nine thousand, five hundred ninety-one".