16000813 has 2 divisors, whose sum is σ = 16000814. Its totient is φ = 16000812.

The previous prime is 16000799. The next prime is 16000819. The reversal of 16000813 is 31800061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15264649 + 736164 = 3907^2 + 858^2 .

It is a cyclic number.

It is not a de Polignac number, because 16000813 - 2⁵ = 16000781 is a prime.

16000813 is a modest number, since divided by 813 gives 160 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16000819) 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 as a sum of consecutive naturals, namely, 8000406 + 8000407.

It is an arithmetic number, because the mean of its divisors is an integer number (8000407).

Almost surely, 2^16000813 is an apocalyptic number.

It is an amenable number.

16000813 is a deficient number, since it is larger than the sum of its proper divisors (1).

16000813 is an equidigital number, since it uses as much as digits as its factorization.

16000813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 16000813 is about 4000.1016237091. The cubic root of 16000813 is about 251.9884778892.

Adding to 16000813 its reverse (31800061), we get a palindrome (47800874).

The spelling of 16000813 in words is "sixteen million, eight hundred thirteen", and thus it is an aban number.