78168319 has 2 divisors, whose sum is σ = 78168320. Its totient is φ = 78168318.

The previous prime is 78168317. The next prime is 78168341. The reversal of 78168319 is 91386187.

It is a weak prime.

It is an emirp because it is prime and its reverse (91386187) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78168319 - 2¹ = 78168317 is a prime.

It is a super-2 number, since 2×78168319² = 12220572190571522, which contains 22 as substring.

Together with 78168317, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78168313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39084159 + 39084160.

It is an arithmetic number, because the mean of its divisors is an integer number (39084160).

Almost surely, 2^78168319 is an apocalyptic number.

78168319 is a deficient number, since it is larger than the sum of its proper divisors (1).

78168319 is an equidigital number, since it uses as much as digits as its factorization.

78168319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 43.

The square root of 78168319 is about 8841.2849179291. The cubic root of 78168319 is about 427.5729848145.

It can be divided in two parts, 78168 and 319, that added together give a palindrome (78487).

The spelling of 78168319 in words is "seventy-eight million, one hundred sixty-eight thousand, three hundred nineteen".