2365639 has 2 divisors, whose sum is σ = 2365640. Its totient is φ = 2365638.

The previous prime is 2365637. The next prime is 2365667. The reversal of 2365639 is 9365632.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2365639 - 2¹ = 2365637 is a prime.

Together with 2365637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2365631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1182819 + 1182820.

It is an arithmetic number, because the mean of its divisors is an integer number (1182820).

2^2365639 is an apocalyptic number.

2365639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2365639 is an equidigital number, since it uses as much as digits as its factorization.

2365639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 34.

The square root of 2365639 is about 1538.0633927118. The cubic root of 2365639 is about 133.2445610481.

The spelling of 2365639 in words is "two million, three hundred sixty-five thousand, six hundred thirty-nine".