213304387 has 2 divisors, whose sum is σ = 213304388. Its totient is φ = 213304386.

The previous prime is 213304379. The next prime is 213304391. The reversal of 213304387 is 783403312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213304387 - 2³ = 213304379 is a prime.

It is not a weakly prime, because it can be changed into another prime (213304307) 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, 106652193 + 106652194.

It is an arithmetic number, because the mean of its divisors is an integer number (106652194).

Almost surely, 2^213304387 is an apocalyptic number.

213304387 is a deficient number, since it is larger than the sum of its proper divisors (1).

213304387 is an equidigital number, since it uses as much as digits as its factorization.

213304387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 213304387 is about 14604.9439232063. The cubic root of 213304387 is about 597.4936066028.

Adding to 213304387 its reverse (783403312), we get a palindrome (996707699).

The spelling of 213304387 in words is "two hundred thirteen million, three hundred four thousand, three hundred eighty-seven".