68818129 has 2 divisors, whose sum is σ = 68818130. Its totient is φ = 68818128.

The previous prime is 68818121. The next prime is 68818147. The reversal of 68818129 is 92181886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52171729 + 16646400 = 7223^2 + 4080^2 .

It is a cyclic number.

It is not a de Polignac number, because 68818129 - 2³ = 68818121 is a prime.

It is not a weakly prime, because it can be changed into another prime (68818121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34409064 + 34409065.

It is an arithmetic number, because the mean of its divisors is an integer number (34409065).

Almost surely, 2^68818129 is an apocalyptic number.

It is an amenable number.

68818129 is a deficient number, since it is larger than the sum of its proper divisors (1).

68818129 is an equidigital number, since it uses as much as digits as its factorization.

68818129 is an evil number, because the sum of its binary digits is even.

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

The square root of 68818129 is about 8295.6692918655. The cubic root of 68818129 is about 409.7959107198.

The spelling of 68818129 in words is "sixty-eight million, eight hundred eighteen thousand, one hundred twenty-nine".