427217213 has 2 divisors, whose sum is σ = 427217214. Its totient is φ = 427217212.

The previous prime is 427217159. The next prime is 427217233. The reversal of 427217213 is 312712724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372412804 + 54804409 = 19298^2 + 7403^2 .

It is a cyclic number.

It is not a de Polignac number, because 427217213 - 2²² = 423022909 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 (427217233) 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, 213608606 + 213608607.

It is an arithmetic number, because the mean of its divisors is an integer number (213608607).

Almost surely, 2^427217213 is an apocalyptic number.

It is an amenable number.

427217213 is a deficient number, since it is larger than the sum of its proper divisors (1).

427217213 is an equidigital number, since it uses as much as digits as its factorization.

427217213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 29.

The square root of 427217213 is about 20669.2334884485. The cubic root of 427217213 is about 753.1524863920.

Adding to 427217213 its reverse (312712724), we get a palindrome (739929937).

The spelling of 427217213 in words is "four hundred twenty-seven million, two hundred seventeen thousand, two hundred thirteen".