78179713 has 2 divisors, whose sum is σ = 78179714. Its totient is φ = 78179712.

The previous prime is 78179711. The next prime is 78179729. The reversal of 78179713 is 31797187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72386064 + 5793649 = 8508^2 + 2407^2 .

It is an emirp because it is prime and its reverse (31797187) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78179713 - 2¹ = 78179711 is a prime.

It is a super-2 number, since 2×78179713² = 12224135049524738, which contains 22 as substring.

Together with 78179711, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 78179713.

It is not a weakly prime, because it can be changed into another prime (78179711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39089856 + 39089857.

It is an arithmetic number, because the mean of its divisors is an integer number (39089857).

Almost surely, 2^78179713 is an apocalyptic number.

It is an amenable number.

78179713 is a deficient number, since it is larger than the sum of its proper divisors (1).

78179713 is an equidigital number, since it uses as much as digits as its factorization.

78179713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 43.

The square root of 78179713 is about 8841.9292578034. The cubic root of 78179713 is about 427.5937584901.

The spelling of 78179713 in words is "seventy-eight million, one hundred seventy-nine thousand, seven hundred thirteen".