68587889 has 2 divisors, whose sum is σ = 68587890. Its totient is φ = 68587888.

The previous prime is 68587873. The next prime is 68587901. The reversal of 68587889 is 98878586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65286400 + 3301489 = 8080^2 + 1817^2 .

It is a cyclic number.

It is not a de Polignac number, because 68587889 - 2⁴ = 68587873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68587859) 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, 34293944 + 34293945.

It is an arithmetic number, because the mean of its divisors is an integer number (34293945).

Almost surely, 2^68587889 is an apocalyptic number.

It is an amenable number.

68587889 is a deficient number, since it is larger than the sum of its proper divisors (1).

68587889 is an equidigital number, since it uses as much as digits as its factorization.

68587889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7741440, while the sum is 59.

The square root of 68587889 is about 8281.7805452692. The cubic root of 68587889 is about 409.3383916063.

The spelling of 68587889 in words is "sixty-eight million, five hundred eighty-seven thousand, eight hundred eighty-nine".