213323399 has 2 divisors, whose sum is σ = 213323400. Its totient is φ = 213323398.

The previous prime is 213323371. The next prime is 213323401. The reversal of 213323399 is 993323312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213323399 is a prime.

It is a Sophie Germain prime.

Together with 213323401, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_11774843 and since 213323399 and 11774843 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 (213323309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106661699 + 106661700.

It is an arithmetic number, because the mean of its divisors is an integer number (106661700).

Almost surely, 2^213323399 is an apocalyptic number.

213323399 is a deficient number, since it is larger than the sum of its proper divisors (1).

213323399 is an equidigital number, since it uses as much as digits as its factorization.

213323399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 35.

The square root of 213323399 is about 14605.5947841914. The cubic root of 213323399 is about 597.5113577785.

The spelling of 213323399 in words is "two hundred thirteen million, three hundred twenty-three thousand, three hundred ninety-nine".