16311489 has 4 divisors (see below), whose sum is σ = 21748656. Its totient is φ = 10874324.

The previous prime is 16311467. The next prime is 16311509. The reversal of 16311489 is 98411361.

16311489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16311489 - 2¹² = 16307393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16311419) 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, 2718579 + ... + 2718584.

It is an arithmetic number, because the mean of its divisors is an integer number (5437164).

Almost surely, 2^16311489 is an apocalyptic number.

It is an amenable number.

16311489 is a deficient number, since it is larger than the sum of its proper divisors (5437167).

16311489 is an equidigital number, since it uses as much as digits as its factorization.

16311489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5437166.

The product of its digits is 5184, while the sum is 33.

The square root of 16311489 is about 4038.7484447536. The cubic root of 16311489 is about 253.6089265750.

The spelling of 16311489 in words is "sixteen million, three hundred eleven thousand, four hundred eighty-nine".