2618643 has 8 divisors (see below), whose sum is σ = 3499408. Its totient is φ = 1741824.

The previous prime is 2618633. The next prime is 2618653. The reversal of 2618643 is 3468162.

It is an interprime number because it is at equal distance from previous prime (2618633) and next prime (2618653).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2618643 - 2⁶ = 2618579 is a prime.

It is a super-2 number, since 2×2618643² = 13714582322898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2618643.

It is not an unprimeable number, because it can be changed into a prime (2618633) 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 7 ways as a sum of consecutive naturals, for example, 1371 + ... + 2667.

It is an arithmetic number, because the mean of its divisors is an integer number (437426).

2^2618643 is an apocalyptic number.

2618643 is a deficient number, since it is larger than the sum of its proper divisors (880765).

2618643 is a wasteful number, since it uses less digits than its factorization.

2618643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973.

The product of its digits is 6912, while the sum is 30.

The square root of 2618643 is about 1618.2221726327. Note that the first 3 decimals coincide. The cubic root of 2618643 is about 137.8347633727.

The spelling of 2618643 in words is "two million, six hundred eighteen thousand, six hundred forty-three".