16424489 has 4 divisors (see below), whose sum is σ = 16649556. Its totient is φ = 16199424.

The previous prime is 16424467. The next prime is 16424491. The reversal of 16424489 is 98442461.

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 13213225 + 3211264 = 3635^2 + 1792^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16424489 is a prime.

It is a super-2 number, since 2×16424489² = 539527677822242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16424449) 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, 112424 + ... + 112569.

It is an arithmetic number, because the mean of its divisors is an integer number (4162389).

Almost surely, 2^16424489 is an apocalyptic number.

It is an amenable number.

16424489 is a deficient number, since it is larger than the sum of its proper divisors (225067).

16424489 is an equidigital number, since it uses as much as digits as its factorization.

16424489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225066.

The product of its digits is 55296, while the sum is 38.

The square root of 16424489 is about 4052.7137821465. The cubic root of 16424489 is about 254.1932158716.

The spelling of 16424489 in words is "sixteen million, four hundred twenty-four thousand, four hundred eighty-nine".