76985647897 has 2 divisors, whose sum is σ = 76985647898. Its totient is φ = 76985647896.

The previous prime is 76985647873. The next prime is 76985647903. The reversal of 76985647897 is 79874658967.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76656443161 + 329204736 = 276869^2 + 18144^2 .

It is a cyclic number.

It is not a de Polignac number, because 76985647897 - 2¹⁵ = 76985615129 is a prime.

It is a super-3 number, since 3×76985647897³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (76985647867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38492823948 + 38492823949.

It is an arithmetic number, because the mean of its divisors is an integer number (38492823949).

Almost surely, 2^76985647897 is an apocalyptic number.

It is an amenable number.

76985647897 is a deficient number, since it is larger than the sum of its proper divisors (1).

76985647897 is an equidigital number, since it uses as much as digits as its factorization.

76985647897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1280240640, while the sum is 76.

The spelling of 76985647897 in words is "seventy-six billion, nine hundred eighty-five million, six hundred forty-seven thousand, eight hundred ninety-seven".