16609013 has 6 divisors (see below), whose sum is σ = 17363094. Its totient is φ = 15886376.

The previous prime is 16608989. The next prime is 16609027. The reversal of 16609013 is 31090661.

It can be written as a sum of positive squares in only one way, i.e., 13712209 + 2896804 = 3703^2 + 1702^2 .

It is not a de Polignac number, because 16609013 - 2¹⁰ = 16607989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16609613) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15170 + ... + 16227.

It is an arithmetic number, because the mean of its divisors is an integer number (2893849).

Almost surely, 2^16609013 is an apocalyptic number.

It is an amenable number.

16609013 is a deficient number, since it is larger than the sum of its proper divisors (754081).

16609013 is an equidigital number, since it uses as much as digits as its factorization.

16609013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31443 (or 31420 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 16609013 is about 4075.4156843198. The cubic root of 16609013 is about 255.1416001971.

Adding to 16609013 its reverse (31090661), we get a palindrome (47699674).

The spelling of 16609013 in words is "sixteen million, six hundred nine thousand, thirteen".