78317936971 has 2 divisors, whose sum is σ = 78317936972. Its totient is φ = 78317936970.

The previous prime is 78317936969. The next prime is 78317936987. The reversal of 78317936971 is 17963971387.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78317936971 - 2¹ = 78317936969 is a prime.

It is a super-2 number, since 2×78317936971² (a number of 23 digits) contains 22 as substring.

Together with 78317936969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (78317936911) 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, 39158968485 + 39158968486.

It is an arithmetic number, because the mean of its divisors is an integer number (39158968486).

Almost surely, 2^78317936971 is an apocalyptic number.

78317936971 is a deficient number, since it is larger than the sum of its proper divisors (1).

78317936971 is an equidigital number, since it uses as much as digits as its factorization.

78317936971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12002256, while the sum is 61.

The spelling of 78317936971 in words is "seventy-eight billion, three hundred seventeen million, nine hundred thirty-six thousand, nine hundred seventy-one".