2765623 has 4 divisors (see below), whose sum is σ = 3160720. Its totient is φ = 2370528.

The previous prime is 2765617. The next prime is 2765641. The reversal of 2765623 is 3265672.

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 2765623 - 2⁵ = 2765591 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 7² + 6 + 5⁹ + 6⁷ + 2¹⁹ + 3³ .

It is a Duffinian number.

2765623 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2765123) 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, 197538 + ... + 197551.

It is an arithmetic number, because the mean of its divisors is an integer number (790180).

2^2765623 is an apocalyptic number.

2765623 is a deficient number, since it is larger than the sum of its proper divisors (395097).

2765623 is an equidigital number, since it uses as much as digits as its factorization.

2765623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395096.

The product of its digits is 15120, while the sum is 31.

The square root of 2765623 is about 1663.0162356393. The cubic root of 2765623 is about 140.3667763640.

It can be divided in two parts, 2 and 765623, that added together give a square (765625 = 875²).

The spelling of 2765623 in words is "two million, seven hundred sixty-five thousand, six hundred twenty-three".