213023717 has 2 divisors, whose sum is σ = 213023718. Its totient is φ = 213023716.

The previous prime is 213023669. The next prime is 213023743. The reversal of 213023717 is 717320312.

It is an a-pointer prime, because the next prime (213023743) can be obtained adding 213023717 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211586116 + 1437601 = 14546^2 + 1199^2 .

It is a cyclic number.

It is not a de Polignac number, because 213023717 - 2¹⁸ = 212761573 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 (213023747) 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, 106511858 + 106511859.

It is an arithmetic number, because the mean of its divisors is an integer number (106511859).

Almost surely, 2^213023717 is an apocalyptic number.

It is an amenable number.

213023717 is a deficient number, since it is larger than the sum of its proper divisors (1).

213023717 is an equidigital number, since it uses as much as digits as its factorization.

213023717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 213023717 is about 14595.3320277409. The cubic root of 213023717 is about 597.2314270631.

The spelling of 213023717 in words is "two hundred thirteen million, twenty-three thousand, seven hundred seventeen".