1311725589 has 4 divisors (see below), whose sum is σ = 1748967456. Its totient is φ = 874483724.

The previous prime is 1311725579. The next prime is 1311725647. The reversal of 1311725589 is 9855271131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9855271131 = 3 ⋅3285090377.

It is a cyclic number.

It is not a de Polignac number, because 1311725589 - 2⁴ = 1311725573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311725589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311725509) 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, 218620929 + ... + 218620934.

It is an arithmetic number, because the mean of its divisors is an integer number (437241864).

Almost surely, 2^1311725589 is an apocalyptic number.

It is an amenable number.

1311725589 is a deficient number, since it is larger than the sum of its proper divisors (437241867).

1311725589 is an equidigital number, since it uses as much as digits as its factorization.

1311725589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437241866.

The product of its digits is 75600, while the sum is 42.

The square root of 1311725589 is about 36217.7524012742. The cubic root of 1311725589 is about 1094.6644062386.

The spelling of 1311725589 in words is "one billion, three hundred eleven million, seven hundred twenty-five thousand, five hundred eighty-nine".