2664439 has 2 divisors, whose sum is σ = 2664440. Its totient is φ = 2664438.

The previous prime is 2664401. The next prime is 2664443. The reversal of 2664439 is 9344662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2664439 - 2¹⁷ = 2533367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2664449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332219 + 1332220.

It is an arithmetic number, because the mean of its divisors is an integer number (1332220).

2^2664439 is an apocalyptic number.

2664439 is a deficient number, since it is larger than the sum of its proper divisors (1).

2664439 is an equidigital number, since it uses as much as digits as its factorization.

2664439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 34.

The square root of 2664439 is about 1632.3109385163. The cubic root of 2664439 is about 138.6336296676.

The spelling of 2664439 in words is "two million, six hundred sixty-four thousand, four hundred thirty-nine".