2689597439 has 4 divisors (see below), whose sum is σ = 2689894656. Its totient is φ = 2689300224.

The previous prime is 2689597433. The next prime is 2689597511. The reversal of 2689597439 is 9347959862.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2689597439 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 (2689597433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134594 + ... + 153279.

It is an arithmetic number, because the mean of its divisors is an integer number (672473664).

Almost surely, 2^2689597439 is an apocalyptic number.

2689597439 is a deficient number, since it is larger than the sum of its proper divisors (297217).

2689597439 is an equidigital number, since it uses as much as digits as its factorization.

2689597439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297216.

The product of its digits is 29393280, while the sum is 62.

The square root of 2689597439 is about 51861.3289359230. The cubic root of 2689597439 is about 1390.6860369685.

The spelling of 2689597439 in words is "two billion, six hundred eighty-nine million, five hundred ninety-seven thousand, four hundred thirty-nine".