16864013 has 2 divisors, whose sum is σ = 16864014. Its totient is φ = 16864012.

The previous prime is 16863989. The next prime is 16864033. The reversal of 16864013 is 31046861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14115049 + 2748964 = 3757^2 + 1658^2 .

It is an emirp because it is prime and its reverse (31046861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16864013 - 2¹⁸ = 16601869 is a prime.

It is equal to p_1083098 and since 16864013 and 1083098 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16864033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8432006 + 8432007.

It is an arithmetic number, because the mean of its divisors is an integer number (8432007).

Almost surely, 2^16864013 is an apocalyptic number.

It is an amenable number.

16864013 is a deficient number, since it is larger than the sum of its proper divisors (1).

16864013 is an equidigital number, since it uses as much as digits as its factorization.

16864013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 16864013 is about 4106.5816684927. The cubic root of 16864013 is about 256.4407132323.

The spelling of 16864013 in words is "sixteen million, eight hundred sixty-four thousand, thirteen".