78079117 has 2 divisors, whose sum is σ = 78079118. Its totient is φ = 78079116.

The previous prime is 78079103. The next prime is 78079163. The reversal of 78079117 is 71197087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71673156 + 6405961 = 8466^2 + 2531^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78079117 is a prime.

It is a super-2 number, since 2×78079117² = 12192697022999378, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78079117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78079517) 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, 39039558 + 39039559.

It is an arithmetic number, because the mean of its divisors is an integer number (39039559).

Almost surely, 2^78079117 is an apocalyptic number.

It is an amenable number.

78079117 is a deficient number, since it is larger than the sum of its proper divisors (1).

78079117 is an equidigital number, since it uses as much as digits as its factorization.

78079117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 40.

The square root of 78079117 is about 8836.2388491937. The cubic root of 78079117 is about 427.4102808654.

It can be divided in two parts, 780 and 79117, that added together give a palindrome (79897).

The spelling of 78079117 in words is "seventy-eight million, seventy-nine thousand, one hundred seventeen".