787648769 has 2 divisors, whose sum is σ = 787648770. Its totient is φ = 787648768.

The previous prime is 787648751. The next prime is 787648783. The reversal of 787648769 is 967846787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 738480625 + 49168144 = 27175^2 + 7012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-787648769 is a prime.

It is a super-2 number, since 2×787648769² = 1240781166614430722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (787648739) 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, 393824384 + 393824385.

It is an arithmetic number, because the mean of its divisors is an integer number (393824385).

Almost surely, 2^787648769 is an apocalyptic number.

It is an amenable number.

787648769 is a deficient number, since it is larger than the sum of its proper divisors (1).

787648769 is an equidigital number, since it uses as much as digits as its factorization.

787648769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28449792, while the sum is 62.

The square root of 787648769 is about 28065.0809548093. The cubic root of 787648769 is about 923.5155226017.

The spelling of 787648769 in words is "seven hundred eighty-seven million, six hundred forty-eight thousand, seven hundred sixty-nine".