775381853 has 2 divisors, whose sum is σ = 775381854. Its totient is φ = 775381852.

The previous prime is 775381771. The next prime is 775381877. The reversal of 775381853 is 358183577.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 481670809 + 293711044 = 21947^2 + 17138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-775381853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 775381798 and 775381807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (775381153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387690926 + 387690927.

It is an arithmetic number, because the mean of its divisors is an integer number (387690927).

Almost surely, 2^775381853 is an apocalyptic number.

It is an amenable number.

775381853 is a deficient number, since it is larger than the sum of its proper divisors (1).

775381853 is an equidigital number, since it uses as much as digits as its factorization.

775381853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705600, while the sum is 47.

The square root of 775381853 is about 27845.6792519055. The cubic root of 775381853 is about 918.6961101376.

The spelling of 775381853 in words is "seven hundred seventy-five million, three hundred eighty-one thousand, eight hundred fifty-three".