2649823 has 4 divisors (see below), whose sum is σ = 2890728. Its totient is φ = 2408920.

The previous prime is 2649821. The next prime is 2649851. The reversal of 2649823 is 3289462.

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 2649823 - 2¹ = 2649821 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 (2649821) 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, 120436 + ... + 120457.

It is an arithmetic number, because the mean of its divisors is an integer number (722682).

2^2649823 is an apocalyptic number.

2649823 is a deficient number, since it is larger than the sum of its proper divisors (240905).

2649823 is a wasteful number, since it uses less digits than its factorization.

2649823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240904.

The product of its digits is 20736, while the sum is 34.

The square root of 2649823 is about 1627.8276935843. The cubic root of 2649823 is about 138.3796693214.

The spelling of 2649823 in words is "two million, six hundred forty-nine thousand, eight hundred twenty-three".