68889089 has 2 divisors, whose sum is σ = 68889090. Its totient is φ = 68889088.

The previous prime is 68889077. The next prime is 68889131. The reversal of 68889089 is 98098886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60964864 + 7924225 = 7808^2 + 2815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68889089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68889019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34444544 + 34444545.

It is an arithmetic number, because the mean of its divisors is an integer number (34444545).

Almost surely, 2^68889089 is an apocalyptic number.

It is an amenable number.

68889089 is a deficient number, since it is larger than the sum of its proper divisors (1).

68889089 is an equidigital number, since it uses as much as digits as its factorization.

68889089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 56.

The square root of 68889089 is about 8299.9451203005. The cubic root of 68889089 is about 409.9367124206.

The spelling of 68889089 in words is "sixty-eight million, eight hundred eighty-nine thousand, eighty-nine".