78078167 has 2 divisors, whose sum is σ = 78078168. Its totient is φ = 78078166.

The previous prime is 78078157. The next prime is 78078173. The reversal of 78078167 is 76187087.

It is a strong prime.

It is an emirp because it is prime and its reverse (76187087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78078167 - 2⁸ = 78077911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78078137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39039083 + 39039084.

It is an arithmetic number, because the mean of its divisors is an integer number (39039084).

Almost surely, 2^78078167 is an apocalyptic number.

78078167 is a deficient number, since it is larger than the sum of its proper divisors (1).

78078167 is an equidigital number, since it uses as much as digits as its factorization.

78078167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131712, while the sum is 44.

The square root of 78078167 is about 8836.1850931270. The cubic root of 78078167 is about 427.4085474039.

The spelling of 78078167 in words is "seventy-eight million, seventy-eight thousand, one hundred sixty-seven".