775412681 has 2 divisors, whose sum is σ = 775412682. Its totient is φ = 775412680.

The previous prime is 775412657. The next prime is 775412689. The reversal of 775412681 is 186214577.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 621255625 + 154157056 = 24925^2 + 12416^2 .

It is a cyclic number.

It is not a de Polignac number, because 775412681 - 2²² = 771218377 is a prime.

It is a super-2 number, since 2×775412681² = 1202529651711215522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (775412689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387706340 + 387706341.

It is an arithmetic number, because the mean of its divisors is an integer number (387706341).

Almost surely, 2^775412681 is an apocalyptic number.

It is an amenable number.

775412681 is a deficient number, since it is larger than the sum of its proper divisors (1).

775412681 is an equidigital number, since it uses as much as digits as its factorization.

775412681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 41.

The square root of 775412681 is about 27846.2327972744. The cubic root of 775412681 is about 918.7082852950.

The spelling of 775412681 in words is "seven hundred seventy-five million, four hundred twelve thousand, six hundred eighty-one".