213954317 has 2 divisors, whose sum is σ = 213954318. Its totient is φ = 213954316.

The previous prime is 213954287. The next prime is 213954331. The reversal of 213954317 is 713459312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186349801 + 27604516 = 13651^2 + 5254^2 .

It is a cyclic number.

It is not a de Polignac number, because 213954317 - 2¹⁸ = 213692173 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 (213954617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106977158 + 106977159.

It is an arithmetic number, because the mean of its divisors is an integer number (106977159).

Almost surely, 2^213954317 is an apocalyptic number.

It is an amenable number.

213954317 is a deficient number, since it is larger than the sum of its proper divisors (1).

213954317 is an equidigital number, since it uses as much as digits as its factorization.

213954317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 35.

The square root of 213954317 is about 14627.1773421942. The cubic root of 213954317 is about 598.0998377322.

The spelling of 213954317 in words is "two hundred thirteen million, nine hundred fifty-four thousand, three hundred seventeen".