16323389 has 4 divisors (see below), whose sum is σ = 16332924. Its totient is φ = 16313856.

The previous prime is 16323379. The next prime is 16323407. The reversal of 16323389 is 98332361.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9406489 + 6916900 = 3067^2 + 2630^2 .

It is a cyclic number.

It is not a de Polignac number, because 16323389 - 2²⁰ = 15274813 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 (16323379) 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, 1412 + ... + 5885.

It is an arithmetic number, because the mean of its divisors is an integer number (4083231).

Almost surely, 2^16323389 is an apocalyptic number.

It is an amenable number.

16323389 is a deficient number, since it is larger than the sum of its proper divisors (9535).

16323389 is an equidigital number, since it uses as much as digits as its factorization.

16323389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9534.

The product of its digits is 23328, while the sum is 35.

The square root of 16323389 is about 4040.2214048242. The cubic root of 16323389 is about 253.6705848048.

The spelling of 16323389 in words is "sixteen million, three hundred twenty-three thousand, three hundred eighty-nine".