68458909 has 2 divisors, whose sum is σ = 68458910. Its totient is φ = 68458908.

The previous prime is 68458891. The next prime is 68458927. The reversal of 68458909 is 90985486.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (68458891) and next prime (68458927).

It can be written as a sum of positive squares in only one way, i.e., 44595684 + 23863225 = 6678^2 + 4885^2 .

It is a cyclic number.

It is not a de Polignac number, because 68458909 - 2⁷ = 68458781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68458979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34229454 + 34229455.

It is an arithmetic number, because the mean of its divisors is an integer number (34229455).

Almost surely, 2^68458909 is an apocalyptic number.

It is an amenable number.

68458909 is a deficient number, since it is larger than the sum of its proper divisors (1).

68458909 is an equidigital number, since it uses as much as digits as its factorization.

68458909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 68458909 is about 8273.9899081398. The cubic root of 68458909 is about 409.0816427067.

The spelling of 68458909 in words is "sixty-eight million, four hundred fifty-eight thousand, nine hundred nine".