213388349 has 2 divisors, whose sum is σ = 213388350. Its totient is φ = 213388348.

The previous prime is 213388339. The next prime is 213388363. The reversal of 213388349 is 943883312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176092900 + 37295449 = 13270^2 + 6107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213388349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213388339) 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, 106694174 + 106694175.

It is an arithmetic number, because the mean of its divisors is an integer number (106694175).

Almost surely, 2^213388349 is an apocalyptic number.

It is an amenable number.

213388349 is a deficient number, since it is larger than the sum of its proper divisors (1).

213388349 is an equidigital number, since it uses as much as digits as its factorization.

213388349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 41.

The square root of 213388349 is about 14607.8180780019. The cubic root of 213388349 is about 597.5719925158.

The spelling of 213388349 in words is "two hundred thirteen million, three hundred eighty-eight thousand, three hundred forty-nine".