775040789 has 2 divisors, whose sum is σ = 775040790. Its totient is φ = 775040788.

The previous prime is 775040779. The next prime is 775040843. The reversal of 775040789 is 987040577.

775040789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 772006225 + 3034564 = 27785^2 + 1742^2 .

It is an emirp because it is prime and its reverse (987040577) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-775040789 is a prime.

It is a super-2 number, since 2×775040789² = 1201376449227485042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (775040719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387520394 + 387520395.

It is an arithmetic number, because the mean of its divisors is an integer number (387520395).

Almost surely, 2^775040789 is an apocalyptic number.

It is an amenable number.

775040789 is a deficient number, since it is larger than the sum of its proper divisors (1).

775040789 is an equidigital number, since it uses as much as digits as its factorization.

775040789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 47.

The square root of 775040789 is about 27839.5543965775. The cubic root of 775040789 is about 918.5613893667.

The spelling of 775040789 in words is "seven hundred seventy-five million, forty thousand, seven hundred eighty-nine".