775299989 has 2 divisors, whose sum is σ = 775299990. Its totient is φ = 775299988.

The previous prime is 775299979. The next prime is 775300003. The reversal of 775299989 is 989992577.

775299989 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., 774675889 + 624100 = 27833^2 + 790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-775299989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (775299919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387649994 + 387649995.

It is an arithmetic number, because the mean of its divisors is an integer number (387649995).

Almost surely, 2^775299989 is an apocalyptic number.

It is an amenable number.

775299989 is a deficient number, since it is larger than the sum of its proper divisors (1).

775299989 is an equidigital number, since it uses as much as digits as its factorization.

775299989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25719120, while the sum is 65.

The square root of 775299989 is about 27844.2092543495. The cubic root of 775299989 is about 918.6637773435.

The spelling of 775299989 in words is "seven hundred seventy-five million, two hundred ninety-nine thousand, nine hundred eighty-nine".