68958689 has 2 divisors, whose sum is σ = 68958690. Its totient is φ = 68958688.

The previous prime is 68958661. The next prime is 68958691. The reversal of 68958689 is 98685986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65480464 + 3478225 = 8092^2 + 1865^2 .

It is a cyclic number.

It is not a de Polignac number, because 68958689 - 2²⁴ = 52181473 is a prime.

Together with 68958691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68958629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34479344 + 34479345.

It is an arithmetic number, because the mean of its divisors is an integer number (34479345).

Almost surely, 2^68958689 is an apocalyptic number.

It is an amenable number.

68958689 is a deficient number, since it is larger than the sum of its proper divisors (1).

68958689 is an equidigital number, since it uses as much as digits as its factorization.

68958689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7464960, while the sum is 59.

The square root of 68958689 is about 8304.1368606256. The cubic root of 68958689 is about 410.0747216579.

The spelling of 68958689 in words is "sixty-eight million, nine hundred fifty-eight thousand, six hundred eighty-nine".