68181829 has 2 divisors, whose sum is σ = 68181830. Its totient is φ = 68181828.

The previous prime is 68181809. The next prime is 68181833. The reversal of 68181829 is 92818186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40985604 + 27196225 = 6402^2 + 5215^2 .

It is a cyclic number.

It is not a de Polignac number, because 68181829 - 2⁹ = 68181317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68181809) 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, 34090914 + 34090915.

It is an arithmetic number, because the mean of its divisors is an integer number (34090915).

Almost surely, 2^68181829 is an apocalyptic number.

It is an amenable number.

68181829 is a deficient number, since it is larger than the sum of its proper divisors (1).

68181829 is an equidigital number, since it uses as much as digits as its factorization.

68181829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 43.

The square root of 68181829 is about 8257.2288935211. The cubic root of 68181829 is about 408.5289919283.

The spelling of 68181829 in words is "sixty-eight million, one hundred eighty-one thousand, eight hundred twenty-nine".