16006813 has 2 divisors, whose sum is σ = 16006814. Its totient is φ = 16006812.

The previous prime is 16006807. The next prime is 16006847. The reversal of 16006813 is 31860061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15824484 + 182329 = 3978^2 + 427^2 .

It is a cyclic number.

It is not a de Polignac number, because 16006813 - 2¹³ = 15998621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16006853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8003406 + 8003407.

It is an arithmetic number, because the mean of its divisors is an integer number (8003407).

Almost surely, 2^16006813 is an apocalyptic number.

It is an amenable number.

16006813 is a deficient number, since it is larger than the sum of its proper divisors (1).

16006813 is an equidigital number, since it uses as much as digits as its factorization.

16006813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 16006813 is about 4000.8515343612. The cubic root of 16006813 is about 252.0199709124.

Adding to 16006813 its reverse (31860061), we get a palindrome (47866874).

The spelling of 16006813 in words is "sixteen million, six thousand, eight hundred thirteen".