67686373 has 2 divisors, whose sum is σ = 67686374. Its totient is φ = 67686372.

The previous prime is 67686371. The next prime is 67686391. The reversal of 67686373 is 37368676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67617729 + 68644 = 8223^2 + 262^2 .

It is a cyclic number.

It is not a de Polignac number, because 67686373 - 2¹ = 67686371 is a prime.

Together with 67686371, it forms a pair of twin primes.

It is equal to p_3989917 and since 67686373 and 3989917 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67686371) 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, 33843186 + 33843187.

It is an arithmetic number, because the mean of its divisors is an integer number (33843187).

Almost surely, 2^67686373 is an apocalyptic number.

It is an amenable number.

67686373 is a deficient number, since it is larger than the sum of its proper divisors (1).

67686373 is an equidigital number, since it uses as much as digits as its factorization.

67686373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 46.

The square root of 67686373 is about 8227.1728436930. The cubic root of 67686373 is about 407.5370345354.

The spelling of 67686373 in words is "sixty-seven million, six hundred eighty-six thousand, three hundred seventy-three".