2945823 has 4 divisors (see below), whose sum is σ = 3927768. Its totient is φ = 1963880.

The previous prime is 2945807. The next prime is 2945851. The reversal of 2945823 is 3285492.

It is a happy number.

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 2945823 - 2⁴ = 2945807 is a prime.

It is a D-number.

2945823 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2945123) 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, 490968 + ... + 490973.

It is an arithmetic number, because the mean of its divisors is an integer number (981942).

2^2945823 is an apocalyptic number.

2945823 is a deficient number, since it is larger than the sum of its proper divisors (981945).

2945823 is an equidigital number, since it uses as much as digits as its factorization.

2945823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981944.

The product of its digits is 17280, while the sum is 33.

The square root of 2945823 is about 1716.3400012818. The cubic root of 2945823 is about 143.3514916001.

The spelling of 2945823 in words is "two million, nine hundred forty-five thousand, eight hundred twenty-three".