76811197 has 2 divisors, whose sum is σ = 76811198. Its totient is φ = 76811196.

The previous prime is 76811173. The next prime is 76811209. The reversal of 76811197 is 79111867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72914521 + 3896676 = 8539^2 + 1974^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76811197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76811107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38405598 + 38405599.

It is an arithmetic number, because the mean of its divisors is an integer number (38405599).

Almost surely, 2^76811197 is an apocalyptic number.

It is an amenable number.

76811197 is a deficient number, since it is larger than the sum of its proper divisors (1).

76811197 is an equidigital number, since it uses as much as digits as its factorization.

76811197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 40.

The square root of 76811197 is about 8764.1997352867. The cubic root of 76811197 is about 425.0840839401.

The spelling of 76811197 in words is "seventy-six million, eight hundred eleven thousand, one hundred ninety-seven".