2945623 has 4 divisors (see below), whose sum is σ = 2986048. Its totient is φ = 2905200.

The previous prime is 2945611. The next prime is 2945639. The reversal of 2945623 is 3265492.

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 2945623 - 2¹⁷ = 2814551 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 (2945123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20103 + ... + 20248.

It is an arithmetic number, because the mean of its divisors is an integer number (746512).

2^2945623 is an apocalyptic number.

2945623 is a deficient number, since it is larger than the sum of its proper divisors (40425).

2945623 is an equidigital number, since it uses as much as digits as its factorization.

2945623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40424.

The product of its digits is 12960, while the sum is 31.

The square root of 2945623 is about 1716.2817367787. The cubic root of 2945623 is about 143.3482473514.

The spelling of 2945623 in words is "two million, nine hundred forty-five thousand, six hundred twenty-three".