213796813 has 2 divisors, whose sum is σ = 213796814. Its totient is φ = 213796812.

The previous prime is 213796789. The next prime is 213796871. The reversal of 213796813 is 318697312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213685924 + 110889 = 14618^2 + 333^2 .

It is a cyclic number.

It is not a de Polignac number, because 213796813 - 2¹³ = 213788621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213776813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106898406 + 106898407.

It is an arithmetic number, because the mean of its divisors is an integer number (106898407).

Almost surely, 2^213796813 is an apocalyptic number.

It is an amenable number.

213796813 is a deficient number, since it is larger than the sum of its proper divisors (1).

213796813 is an equidigital number, since it uses as much as digits as its factorization.

213796813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 213796813 is about 14621.7924003865. The cubic root of 213796813 is about 597.9530365463.

The spelling of 213796813 in words is "two hundred thirteen million, seven hundred ninety-six thousand, eight hundred thirteen".