775138211 has 2 divisors, whose sum is σ = 775138212. Its totient is φ = 775138210.

The previous prime is 775138201. The next prime is 775138261. The reversal of 775138211 is 112831577.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (112831577) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-775138211 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (775138201) 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, 387569105 + 387569106.

It is an arithmetic number, because the mean of its divisors is an integer number (387569106).

Almost surely, 2^775138211 is an apocalyptic number.

775138211 is a deficient number, since it is larger than the sum of its proper divisors (1).

775138211 is an equidigital number, since it uses as much as digits as its factorization.

775138211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 35.

The square root of 775138211 is about 27841.3040463266. The cubic root of 775138211 is about 918.5998752286.

Adding to 775138211 its reverse (112831577), we get a palindrome (887969788).

The spelling of 775138211 in words is "seven hundred seventy-five million, one hundred thirty-eight thousand, two hundred eleven".