16641013 has 4 divisors (see below), whose sum is σ = 16651008. Its totient is φ = 16631020.

The previous prime is 16640999. The next prime is 16641019. The reversal of 16641013 is 31014661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16641013 - 2²¹ = 14543861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16641019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1831 + ... + 6052.

It is an arithmetic number, because the mean of its divisors is an integer number (4162752).

Almost surely, 2^16641013 is an apocalyptic number.

It is an amenable number.

16641013 is a deficient number, since it is larger than the sum of its proper divisors (9995).

16641013 is an equidigital number, since it uses as much as digits as its factorization.

16641013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9994.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 16641013 is about 4079.3397750126. The cubic root of 16641013 is about 255.3053525198.

Adding to 16641013 its reverse (31014661), we get a palindrome (47655674).

The spelling of 16641013 in words is "sixteen million, six hundred forty-one thousand, thirteen".