78615113 has 2 divisors, whose sum is σ = 78615114. Its totient is φ = 78615112.

The previous prime is 78615107. The next prime is 78615133. The reversal of 78615113 is 31151687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72046144 + 6568969 = 8488^2 + 2563^2 .

It is a cyclic number.

It is not a de Polignac number, because 78615113 - 2¹⁰ = 78614089 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78615113.

It is not a weakly prime, because it can be changed into another prime (78615133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39307556 + 39307557.

It is an arithmetic number, because the mean of its divisors is an integer number (39307557).

Almost surely, 2^78615113 is an apocalyptic number.

It is an amenable number.

78615113 is a deficient number, since it is larger than the sum of its proper divisors (1).

78615113 is an equidigital number, since it uses as much as digits as its factorization.

78615113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 32.

The square root of 78615113 is about 8866.5163959697. The cubic root of 78615113 is about 428.3860773047.

The spelling of 78615113 in words is "seventy-eight million, six hundred fifteen thousand, one hundred thirteen".