78920713 has 2 divisors, whose sum is σ = 78920714. Its totient is φ = 78920712.

The previous prime is 78920599. The next prime is 78920731. The reversal of 78920713 is 31702987.

Together with next prime (78920731) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76527504 + 2393209 = 8748^2 + 1547^2 .

It is a cyclic number.

It is not a de Polignac number, because 78920713 - 2⁹ = 78920201 is a prime.

It is not a weakly prime, because it can be changed into another prime (78950713) 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, 39460356 + 39460357.

It is an arithmetic number, because the mean of its divisors is an integer number (39460357).

Almost surely, 2^78920713 is an apocalyptic number.

It is an amenable number.

78920713 is a deficient number, since it is larger than the sum of its proper divisors (1).

78920713 is an equidigital number, since it uses as much as digits as its factorization.

78920713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 78920713 is about 8883.7330554221. The cubic root of 78920713 is about 428.9404470305.

The spelling of 78920713 in words is "seventy-eight million, nine hundred twenty thousand, seven hundred thirteen".