213800647 has 2 divisors, whose sum is σ = 213800648. Its totient is φ = 213800646.

The previous prime is 213800641. The next prime is 213800651. The reversal of 213800647 is 746008312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213800647 - 2⁷ = 213800519 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213800641) 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, 106900323 + 106900324.

It is an arithmetic number, because the mean of its divisors is an integer number (106900324).

Almost surely, 2^213800647 is an apocalyptic number.

213800647 is a deficient number, since it is larger than the sum of its proper divisors (1).

213800647 is an equidigital number, since it uses as much as digits as its factorization.

213800647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 213800647 is about 14621.9235054763. The cubic root of 213800647 is about 597.9566108719.

Adding to 213800647 its reverse (746008312), we get a palindrome (959808959).

The spelling of 213800647 in words is "two hundred thirteen million, eight hundred thousand, six hundred forty-seven".