16641313 has 4 divisors (see below), whose sum is σ = 17921428. Its totient is φ = 15361200.

The previous prime is 16641307. The next prime is 16641319. The reversal of 16641313 is 31314661.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (16641307) and next prime (16641319).

It can be written as a sum of positive squares in 2 ways, for example, as 3157729 + 13483584 = 1777^2 + 3672^2 .

It is a cyclic number.

It is not a de Polignac number, because 16641313 - 2⁵ = 16641281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16641319) 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, 640038 + ... + 640063.

It is an arithmetic number, because the mean of its divisors is an integer number (4480357).

Almost surely, 2^16641313 is an apocalyptic number.

16641313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16641313 is a deficient number, since it is larger than the sum of its proper divisors (1280115).

16641313 is a wasteful number, since it uses less digits than its factorization.

16641313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280114.

The product of its digits is 1296, while the sum is 25.

The square root of 16641313 is about 4079.3765455030. The cubic root of 16641313 is about 255.3068867042.

Adding to 16641313 its reverse (31314661), we get a palindrome (47955974).

The spelling of 16641313 in words is "sixteen million, six hundred forty-one thousand, three hundred thirteen".