76788769 has 2 divisors, whose sum is σ = 76788770. Its totient is φ = 76788768.

The previous prime is 76788749. The next prime is 76788787. The reversal of 76788769 is 96788767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70761744 + 6027025 = 8412^2 + 2455^2 .

It is an emirp because it is prime and its reverse (96788767) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76788769 - 2⁵ = 76788737 is a prime.

It is a super-2 number, since 2×76788769² = 11793030089070722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (76788749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38394384 + 38394385.

It is an arithmetic number, because the mean of its divisors is an integer number (38394385).

Almost surely, 2^76788769 is an apocalyptic number.

It is an amenable number.

76788769 is a deficient number, since it is larger than the sum of its proper divisors (1).

76788769 is an equidigital number, since it uses as much as digits as its factorization.

76788769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7112448, while the sum is 58.

The square root of 76788769 is about 8762.9201183167. The cubic root of 76788769 is about 425.0427066657.

The spelling of 76788769 in words is "seventy-six million, seven hundred eighty-eight thousand, seven hundred sixty-nine".