68194879 has 2 divisors, whose sum is σ = 68194880. Its totient is φ = 68194878.

The previous prime is 68194877. The next prime is 68194909. The reversal of 68194879 is 97849186.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68194879 - 2¹ = 68194877 is a prime.

Together with 68194877, it forms a pair of twin primes.

It is a plaindrome in base 13.

It is a zygodrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68194877) 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, 34097439 + 34097440.

It is an arithmetic number, because the mean of its divisors is an integer number (34097440).

Almost surely, 2^68194879 is an apocalyptic number.

68194879 is a deficient number, since it is larger than the sum of its proper divisors (1).

68194879 is an equidigital number, since it uses as much as digits as its factorization.

68194879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 52.

The square root of 68194879 is about 8258.0190723926. The cubic root of 68194879 is about 408.5550544111. Note that the first 3 decimals are identical.

The spelling of 68194879 in words is "sixty-eight million, one hundred ninety-four thousand, eight hundred seventy-nine".