213730679 has 2 divisors, whose sum is σ = 213730680. Its totient is φ = 213730678.

The previous prime is 213730669. The next prime is 213730687. The reversal of 213730679 is 976037312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213730679 - 2¹⁶ = 213665143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213730669) 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, 106865339 + 106865340.

It is an arithmetic number, because the mean of its divisors is an integer number (106865340).

Almost surely, 2^213730679 is an apocalyptic number.

213730679 is a deficient number, since it is larger than the sum of its proper divisors (1).

213730679 is an equidigital number, since it uses as much as digits as its factorization.

213730679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 38.

The square root of 213730679 is about 14619.5307380230. The cubic root of 213730679 is about 597.8913750342.

The spelling of 213730679 in words is "two hundred thirteen million, seven hundred thirty thousand, six hundred seventy-nine".