16459409 has 8 divisors (see below), whose sum is σ = 16974888. Its totient is φ = 15949440.

The previous prime is 16459403. The next prime is 16459423. The reversal of 16459409 is 90495461.

It can be written as a sum of positive squares in 4 ways, for example, as 16384 + 16443025 = 128^2 + 4055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16459409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16459403) 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 7 ways as a sum of consecutive naturals, for example, 5159 + ... + 7715.

It is an arithmetic number, because the mean of its divisors is an integer number (2121861).

Almost surely, 2^16459409 is an apocalyptic number.

It is an amenable number.

16459409 is a deficient number, since it is larger than the sum of its proper divisors (515479).

16459409 is a wasteful number, since it uses less digits than its factorization.

16459409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2755.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 16459409 is about 4057.0197189563. The cubic root of 16459409 is about 254.3732345379.

The spelling of 16459409 in words is "sixteen million, four hundred fifty-nine thousand, four hundred nine".