2618939 has 4 divisors (see below), whose sum is σ = 2623656. Its totient is φ = 2614224.

The previous prime is 2618933. The next prime is 2618953. The reversal of 2618939 is 9398162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9398162 = 2 ⋅4699081.

It is a cyclic number.

It is not a de Polignac number, because 2618939 - 2⁴ = 2618923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2618933) 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, 1394 + ... + 2679.

It is an arithmetic number, because the mean of its divisors is an integer number (655914).

2^2618939 is an apocalyptic number.

2618939 is a deficient number, since it is larger than the sum of its proper divisors (4717).

2618939 is an equidigital number, since it uses as much as digits as its factorization.

2618939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4716.

The product of its digits is 23328, while the sum is 38.

The square root of 2618939 is about 1618.3136284417. The cubic root of 2618939 is about 137.8399565908.

The spelling of 2618939 in words is "two million, six hundred eighteen thousand, nine hundred thirty-nine".