68184689 has 2 divisors, whose sum is σ = 68184690. Its totient is φ = 68184688.

The previous prime is 68184653. The next prime is 68184709. The reversal of 68184689 is 98648186.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60528400 + 7656289 = 7780^2 + 2767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68184689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (68187689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34092344 + 34092345.

It is an arithmetic number, because the mean of its divisors is an integer number (34092345).

Almost surely, 2^68184689 is an apocalyptic number.

It is an amenable number.

68184689 is a deficient number, since it is larger than the sum of its proper divisors (1).

68184689 is an equidigital number, since it uses as much as digits as its factorization.

68184689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 50.

The square root of 68184689 is about 8257.4020732916. The cubic root of 68184689 is about 408.5347039906.

The spelling of 68184689 in words is "sixty-eight million, one hundred eighty-four thousand, six hundred eighty-nine".