78315163 has 2 divisors, whose sum is σ = 78315164. Its totient is φ = 78315162.

The previous prime is 78315137. The next prime is 78315173. The reversal of 78315163 is 36151387.

It is a strong prime.

It is an emirp because it is prime and its reverse (36151387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78315163 - 2¹³ = 78306971 is a prime.

It is a super-2 number, since 2×78315163² = 12266529511433138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78315103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39157581 + 39157582.

It is an arithmetic number, because the mean of its divisors is an integer number (39157582).

Almost surely, 2^78315163 is an apocalyptic number.

78315163 is a deficient number, since it is larger than the sum of its proper divisors (1).

78315163 is an equidigital number, since it uses as much as digits as its factorization.

78315163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 78315163 is about 8849.5854705178. The cubic root of 78315163 is about 427.8405580592.

The spelling of 78315163 in words is "seventy-eight million, three hundred fifteen thousand, one hundred sixty-three".