16311589 has 4 divisors (see below), whose sum is σ = 18641824. Its totient is φ = 13981356.

The previous prime is 16311571. The next prime is 16311593. The reversal of 16311589 is 98511361.

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.

It is a cyclic number.

It is not a de Polignac number, because 16311589 - 2¹¹ = 16309541 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 (16311509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1165107 + ... + 1165120.

It is an arithmetic number, because the mean of its divisors is an integer number (4660456).

Almost surely, 2^16311589 is an apocalyptic number.

It is an amenable number.

16311589 is a deficient number, since it is larger than the sum of its proper divisors (2330235).

16311589 is an equidigital number, since it uses as much as digits as its factorization.

16311589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330234.

The product of its digits is 6480, while the sum is 34.

The square root of 16311589 is about 4038.7608248075. The cubic root of 16311589 is about 253.6094448363.

It can be divided in two parts, 16311 and 589, that added together give a square (16900 = 130²).

The spelling of 16311589 in words is "sixteen million, three hundred eleven thousand, five hundred eighty-nine".