67198213 has 2 divisors, whose sum is σ = 67198214. Its totient is φ = 67198212.

The previous prime is 67198177. The next prime is 67198237. The reversal of 67198213 is 31289176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56295009 + 10903204 = 7503^2 + 3302^2 .

It is a cyclic number.

It is not a de Polignac number, because 67198213 - 2⁹ = 67197701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67198273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33599106 + 33599107.

It is an arithmetic number, because the mean of its divisors is an integer number (33599107).

Almost surely, 2^67198213 is an apocalyptic number.

It is an amenable number.

67198213 is a deficient number, since it is larger than the sum of its proper divisors (1).

67198213 is an equidigital number, since it uses as much as digits as its factorization.

67198213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 67198213 is about 8197.4516162037. The cubic root of 67198213 is about 406.5549389236.

The spelling of 67198213 in words is "sixty-seven million, one hundred ninety-eight thousand, two hundred thirteen".