2920643 has 4 divisors (see below), whose sum is σ = 3186168. Its totient is φ = 2655120.

The previous prime is 2920637. The next prime is 2920649. The reversal of 2920643 is 3460292.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2920637) and next prime (2920649).

It is a cyclic number.

It is not a de Polignac number, because 2920643 - 2⁶ = 2920579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2920649) 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, 132746 + ... + 132767.

It is an arithmetic number, because the mean of its divisors is an integer number (796542).

2^2920643 is an apocalyptic number.

2920643 is a deficient number, since it is larger than the sum of its proper divisors (265525).

2920643 is a wasteful number, since it uses less digits than its factorization.

2920643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265524.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 2920643 is about 1708.9888823512. The cubic root of 2920643 is about 142.9418806314.

The spelling of 2920643 in words is "two million, nine hundred twenty thousand, six hundred forty-three".