78713165 has 8 divisors (see below), whose sum is σ = 94524408. Its totient is φ = 62924800.

The previous prime is 78713161. The next prime is 78713197. The reversal of 78713165 is 56131787.

It can be written as a sum of positive squares in 4 ways, for example, as 32649796 + 46063369 = 5714^2 + 6787^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78713165 - 2² = 78713161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78713161) 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 in 7 ways as a sum of consecutive naturals, for example, 3089 + ... + 12921.

It is an arithmetic number, because the mean of its divisors is an integer number (11815551).

Almost surely, 2^78713165 is an apocalyptic number.

It is an amenable number.

78713165 is a deficient number, since it is larger than the sum of its proper divisors (15811243).

78713165 is a wasteful number, since it uses less digits than its factorization.

78713165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11439.

The product of its digits is 35280, while the sum is 38.

The square root of 78713165 is about 8872.0440147691. The cubic root of 78713165 is about 428.5641035521.

The spelling of 78713165 in words is "seventy-eight million, seven hundred thirteen thousand, one hundred sixty-five".