68078929 has 2 divisors, whose sum is σ = 68078930. Its totient is φ = 68078928.

The previous prime is 68078917. The next prime is 68078947. The reversal of 68078929 is 92987086.

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., 42928704 + 25150225 = 6552^2 + 5015^2 .

It is a cyclic number.

It is not a de Polignac number, because 68078929 - 2¹⁵ = 68046161 is a prime.

It is not a weakly prime, because it can be changed into another prime (68078909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34039464 + 34039465.

It is an arithmetic number, because the mean of its divisors is an integer number (34039465).

Almost surely, 2^68078929 is an apocalyptic number.

It is an amenable number.

68078929 is a deficient number, since it is larger than the sum of its proper divisors (1).

68078929 is an equidigital number, since it uses as much as digits as its factorization.

68078929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 68078929 is about 8250.9956368913. The cubic root of 68078929 is about 408.3233711670.

The spelling of 68078929 in words is "sixty-eight million, seventy-eight thousand, nine hundred twenty-nine".