77118971 has 2 divisors, whose sum is σ = 77118972. Its totient is φ = 77118970.

The previous prime is 77118961. The next prime is 77119013. The reversal of 77118971 is 17981177.

It is a weak prime.

It is an emirp because it is prime and its reverse (17981177) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77118971 - 2⁶ = 77118907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77118911) 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, 38559485 + 38559486.

It is an arithmetic number, because the mean of its divisors is an integer number (38559486).

Almost surely, 2^77118971 is an apocalyptic number.

77118971 is a deficient number, since it is larger than the sum of its proper divisors (1).

77118971 is an equidigital number, since it uses as much as digits as its factorization.

77118971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 41.

The square root of 77118971 is about 8781.7407727625. The cubic root of 77118971 is about 425.6510823364.

The spelling of 77118971 in words is "seventy-seven million, one hundred eighteen thousand, nine hundred seventy-one".