16397589 has 16 divisors (see below), whose sum is σ = 24785600. Its totient is φ = 9559296.

The previous prime is 16397587. The next prime is 16397611. The reversal of 16397589 is 98579361.

It is not a de Polignac number, because 16397589 - 2¹ = 16397587 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 (16397587) 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 15 ways as a sum of consecutive naturals, for example, 10324 + ... + 11805.

It is an arithmetic number, because the mean of its divisors is an integer number (1549100).

Almost surely, 2^16397589 is an apocalyptic number.

16397589 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16397589 is a deficient number, since it is larger than the sum of its proper divisors (8388011).

16397589 is a wasteful number, since it uses less digits than its factorization.

16397589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22164.

The product of its digits is 408240, while the sum is 48.

The square root of 16397589 is about 4049.3936583148. The cubic root of 16397589 is about 254.0543676374.

The spelling of 16397589 in words is "sixteen million, three hundred ninety-seven thousand, five hundred eighty-nine".