213047677 has 2 divisors, whose sum is σ = 213047678. Its totient is φ = 213047676.

The previous prime is 213047647. The next prime is 213047687. The reversal of 213047677 is 776740312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195692121 + 17355556 = 13989^2 + 4166^2 .

It is a cyclic number.

It is not a de Polignac number, because 213047677 - 2²³ = 204659069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213047647) 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, 106523838 + 106523839.

It is an arithmetic number, because the mean of its divisors is an integer number (106523839).

Almost surely, 2^213047677 is an apocalyptic number.

It is an amenable number.

213047677 is a deficient number, since it is larger than the sum of its proper divisors (1).

213047677 is an equidigital number, since it uses as much as digits as its factorization.

213047677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 213047677 is about 14596.1528150400. The cubic root of 213047677 is about 597.2538175723.

Adding to 213047677 its reverse (776740312), we get a palindrome (989787989).

The spelling of 213047677 in words is "two hundred thirteen million, forty-seven thousand, six hundred seventy-seven".