2664239 has 4 divisors (see below), whose sum is σ = 2683824. Its totient is φ = 2644656.

The previous prime is 2664229. The next prime is 2664241. The reversal of 2664239 is 9324662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9324662 = 2 ⋅4662331.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2664239 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 (2664229) 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, 9587 + ... + 9860.

It is an arithmetic number, because the mean of its divisors is an integer number (670956).

2^2664239 is an apocalyptic number.

2664239 is a deficient number, since it is larger than the sum of its proper divisors (19585).

2664239 is a wasteful number, since it uses less digits than its factorization.

2664239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19584.

The product of its digits is 15552, while the sum is 32.

The square root of 2664239 is about 1632.2496745290. The cubic root of 2664239 is about 138.6301608424.

The spelling of 2664239 in words is "two million, six hundred sixty-four thousand, two hundred thirty-nine".