67994593 has 2 divisors, whose sum is σ = 67994594. Its totient is φ = 67994592.

The previous prime is 67994581. The next prime is 67994603. The reversal of 67994593 is 39549976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37601424 + 30393169 = 6132^2 + 5513^2 .

It is a cyclic number.

It is not a de Polignac number, because 67994593 - 2⁵ = 67994561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67994593.

It is not a weakly prime, because it can be changed into another prime (67994893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33997296 + 33997297.

It is an arithmetic number, because the mean of its divisors is an integer number (33997297).

Almost surely, 2^67994593 is an apocalyptic number.

It is an amenable number.

67994593 is a deficient number, since it is larger than the sum of its proper divisors (1).

67994593 is an equidigital number, since it uses as much as digits as its factorization.

67994593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1837080, while the sum is 52.

The square root of 67994593 is about 8245.8833971867. The cubic root of 67994593 is about 408.1546915182.

The spelling of 67994593 in words is "sixty-seven million, nine hundred ninety-four thousand, five hundred ninety-three".