68558389 has 2 divisors, whose sum is σ = 68558390. Its totient is φ = 68558388.

The previous prime is 68558387. The next prime is 68558411. The reversal of 68558389 is 98385586.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61105489 + 7452900 = 7817^2 + 2730^2 .

It is a cyclic number.

It is not a de Polignac number, because 68558389 - 2¹ = 68558387 is a prime.

Together with 68558387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68558387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34279194 + 34279195.

It is an arithmetic number, because the mean of its divisors is an integer number (34279195).

Almost surely, 2^68558389 is an apocalyptic number.

It is an amenable number.

68558389 is a deficient number, since it is larger than the sum of its proper divisors (1).

68558389 is an equidigital number, since it uses as much as digits as its factorization.

68558389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2073600, while the sum is 52.

The square root of 68558389 is about 8279.9993357488. Note that the first 3 decimals coincide. The cubic root of 68558389 is about 409.2796970156.

The spelling of 68558389 in words is "sixty-eight million, five hundred fifty-eight thousand, three hundred eighty-nine".