2645983 has 4 divisors (see below), whose sum is σ = 2650648. Its totient is φ = 2641320.

The previous prime is 2645977. The next prime is 2645987. The reversal of 2645983 is 3895462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3895462 = 2 ⋅1947731.

It is a cyclic number.

It is not a de Polignac number, because 2645983 - 2²¹ = 548831 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 (2645987) 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, 1341 + ... + 2662.

It is an arithmetic number, because the mean of its divisors is an integer number (662662).

2^2645983 is an apocalyptic number.

2645983 is a deficient number, since it is larger than the sum of its proper divisors (4665).

2645983 is an equidigital number, since it uses as much as digits as its factorization.

2645983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4664.

The product of its digits is 51840, while the sum is 37.

The square root of 2645983 is about 1626.6477799450. The cubic root of 2645983 is about 138.3127925502.

The spelling of 2645983 in words is "two million, six hundred forty-five thousand, nine hundred eighty-three".