78906713 has 2 divisors, whose sum is σ = 78906714. Its totient is φ = 78906712.

The previous prime is 78906703. The next prime is 78906719. The reversal of 78906713 is 31760987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78623689 + 283024 = 8867^2 + 532^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78906713 is a prime.

It is not a weakly prime, because it can be changed into another prime (78906719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39453356 + 39453357.

It is an arithmetic number, because the mean of its divisors is an integer number (39453357).

Almost surely, 2^78906713 is an apocalyptic number.

It is an amenable number.

78906713 is a deficient number, since it is larger than the sum of its proper divisors (1).

78906713 is an equidigital number, since it uses as much as digits as its factorization.

78906713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 78906713 is about 8882.9450634348. The cubic root of 78906713 is about 428.9150818204.

The spelling of 78906713 in words is "seventy-eight million, nine hundred six thousand, seven hundred thirteen".