67716197 has 2 divisors, whose sum is σ = 67716198. Its totient is φ = 67716196.

The previous prime is 67716191. The next prime is 67716199. The reversal of 67716197 is 79161776.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62188996 + 5527201 = 7886^2 + 2351^2 .

It is a cyclic number.

It is not a de Polignac number, because 67716197 - 2⁸ = 67715941 is a prime.

It is a super-2 number, since 2×67716197² = 9170966672285618, which contains 22 as substring.

Together with 67716199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67716191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33858098 + 33858099.

It is an arithmetic number, because the mean of its divisors is an integer number (33858099).

Almost surely, 2^67716197 is an apocalyptic number.

It is an amenable number.

67716197 is a deficient number, since it is larger than the sum of its proper divisors (1).

67716197 is an equidigital number, since it uses as much as digits as its factorization.

67716197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 111132, while the sum is 44.

The square root of 67716197 is about 8228.9851743699. The cubic root of 67716197 is about 407.5968821299.

The spelling of 67716197 in words is "sixty-seven million, seven hundred sixteen thousand, one hundred ninety-seven".