2605723 has 4 divisors (see below), whose sum is σ = 2616120. Its totient is φ = 2595328.

The previous prime is 2605663. The next prime is 2605741. The reversal of 2605723 is 3275062.

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 2605723 - 2¹⁷ = 2474651 is a prime.

It is a d-powerful number, because it can be written as 2²⁰ + 6³ + 0 + 5⁸ + 7⁶ + 2²⁰ + 3⁴ .

It is a Duffinian number.

2605723 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2605753) 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, 4813 + ... + 5326.

It is an arithmetic number, because the mean of its divisors is an integer number (654030).

2^2605723 is an apocalyptic number.

2605723 is a deficient number, since it is larger than the sum of its proper divisors (10397).

2605723 is a wasteful number, since it uses less digits than its factorization.

2605723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10396.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 2605723 is about 1614.2252011414. The cubic root of 2605723 is about 137.6077040429.

The spelling of 2605723 in words is "two million, six hundred five thousand, seven hundred twenty-three".