68718889 has 2 divisors, whose sum is σ = 68718890. Its totient is φ = 68718888.

The previous prime is 68718883. The next prime is 68718901. The reversal of 68718889 is 98881786.

68718889 = T₆₇₆₇ + T₆₇₆₈ + T₆₇₆₉.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59059225 + 9659664 = 7685^2 + 3108^2 .

It is a cyclic number.

It is not a de Polignac number, because 68718889 - 2⁵ = 68718857 is a prime.

It is not a weakly prime, because it can be changed into another prime (68718883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34359444 + 34359445.

It is an arithmetic number, because the mean of its divisors is an integer number (34359445).

Almost surely, 2^68718889 is an apocalyptic number.

68718889 is the 6769-th centered triangular number.

It is an amenable number.

68718889 is a deficient number, since it is larger than the sum of its proper divisors (1).

68718889 is an equidigital number, since it uses as much as digits as its factorization.

68718889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1548288, while the sum is 55.

The square root of 68718889 is about 8289.6856997114. The cubic root of 68718889 is about 409.5988322702.

The spelling of 68718889 in words is "sixty-eight million, seven hundred eighteen thousand, eight hundred eighty-nine".