16724489 has 4 divisors (see below), whose sum is σ = 16890180. Its totient is φ = 16558800.

The previous prime is 16724483. The next prime is 16724501. The reversal of 16724489 is 98442761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12902464 + 3822025 = 3592^2 + 1955^2 .

It is a cyclic number.

It is not a de Polignac number, because 16724489 - 2⁸ = 16724233 is a prime.

It is a super-2 number, since 2×16724489² = 559417064622242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16724483) 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, 82694 + ... + 82895.

It is an arithmetic number, because the mean of its divisors is an integer number (4222545).

Almost surely, 2^16724489 is an apocalyptic number.

It is an amenable number.

16724489 is a deficient number, since it is larger than the sum of its proper divisors (165691).

16724489 is a wasteful number, since it uses less digits than its factorization.

16724489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165690.

The product of its digits is 96768, while the sum is 41.

The square root of 16724489 is about 4089.5585336317. The cubic root of 16724489 is about 255.7315351715.

The spelling of 16724489 in words is "sixteen million, seven hundred twenty-four thousand, four hundred eighty-nine".