775010989 has 2 divisors, whose sum is σ = 775010990. Its totient is φ = 775010988.

The previous prime is 775010981. The next prime is 775011031. The reversal of 775010989 is 989010577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 765462889 + 9548100 = 27667^2 + 3090^2 .

It is a cyclic number.

It is not a de Polignac number, because 775010989 - 2³ = 775010981 is a prime.

775010989 is a modest number, since divided by 10989 gives 775 as remainder.

It is equal to p_39925918 and since 775010989 and 39925918 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (775010981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387505494 + 387505495.

It is an arithmetic number, because the mean of its divisors is an integer number (387505495).

Almost surely, 2^775010989 is an apocalyptic number.

It is an amenable number.

775010989 is a deficient number, since it is larger than the sum of its proper divisors (1).

775010989 is an equidigital number, since it uses as much as digits as its factorization.

775010989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 775010989 is about 27839.0191817169. The cubic root of 775010989 is about 918.5496164464.

The spelling of 775010989 in words is "seven hundred seventy-five million, ten thousand, nine hundred eighty-nine".