16777213 has 2 divisors, whose sum is σ = 16777214. Its totient is φ = 16777212.

The previous prime is 16777199. The next prime is 16777259. The reversal of 16777213 is 31277761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15657849 + 1119364 = 3957^2 + 1058^2 .

It is an emirp because it is prime and its reverse (31277761) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16777213 is a prime.

It is a nialpdrome in base 4, base 8 and base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16771213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8388606 + 8388607.

It is an arithmetic number, because the mean of its divisors is an integer number (8388607).

Almost surely, 2^16777213 is an apocalyptic number.

It is an amenable number.

16777213 is a deficient number, since it is larger than the sum of its proper divisors (1).

16777213 is an equidigital number, since it uses as much as digits as its factorization.

16777213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12348, while the sum is 34.

The square root of 16777213 is about 4095.9996337890. Note that the first 3 decimals coincide. The cubic root of 16777213 is about 255.9999847412. Note that the first 4 decimals are identical.

The spelling of 16777213 in words is "sixteen million, seven hundred seventy-seven thousand, two hundred thirteen".