76812289 has 2 divisors, whose sum is σ = 76812290. Its totient is φ = 76812288.

The previous prime is 76812287. The next prime is 76812293. The reversal of 76812289 is 98221867.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66699889 + 10112400 = 8167^2 + 3180^2 .

It is an emirp because it is prime and its reverse (98221867) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76812289 - 2¹ = 76812287 is a prime.

Together with 76812287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (76812287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38406144 + 38406145.

It is an arithmetic number, because the mean of its divisors is an integer number (38406145).

Almost surely, 2^76812289 is an apocalyptic number.

It is an amenable number.

76812289 is a deficient number, since it is larger than the sum of its proper divisors (1).

76812289 is an equidigital number, since it uses as much as digits as its factorization.

76812289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 43.

The square root of 76812289 is about 8764.2620339650. The cubic root of 76812289 is about 425.0860983583.

The spelling of 76812289 in words is "seventy-six million, eight hundred twelve thousand, two hundred eighty-nine".