78068917 has 2 divisors, whose sum is σ = 78068918. Its totient is φ = 78068916.

The previous prime is 78068897. The next prime is 78068983. The reversal of 78068917 is 71986087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72352036 + 5716881 = 8506^2 + 2391^2 .

It is a cyclic number.

It is not a de Polignac number, because 78068917 - 2¹⁵ = 78036149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78068117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39034458 + 39034459.

It is an arithmetic number, because the mean of its divisors is an integer number (39034459).

Almost surely, 2^78068917 is an apocalyptic number.

It is an amenable number.

78068917 is a deficient number, since it is larger than the sum of its proper divisors (1).

78068917 is an equidigital number, since it uses as much as digits as its factorization.

78068917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 78068917 is about 8835.6616616980. The cubic root of 78068917 is about 427.3916682287.

The spelling of 78068917 in words is "seventy-eight million, sixty-eight thousand, nine hundred seventeen".