775727613 has 12 divisors (see below), whose sum is σ = 1122392700. Its totient is φ = 516276096.

The previous prime is 775727581. The next prime is 775727639. The reversal of 775727613 is 316727577.

775727613 is a `hidden beast` number, since 7 + 7 + 5 + 7 + 27 + 613 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 351450009 + 424277604 = 18747^2 + 20598^2 .

It is not a de Polignac number, because 775727613 - 2⁵ = 775727581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775727413) 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 in 11 ways as a sum of consecutive naturals, for example, 67338 + ... + 78011.

It is an arithmetic number, because the mean of its divisors is an integer number (93532725).

Almost surely, 2^775727613 is an apocalyptic number.

It is an amenable number.

775727613 is a deficient number, since it is larger than the sum of its proper divisors (346665087).

775727613 is a wasteful number, since it uses less digits than its factorization.

775727613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145948 (or 145945 counting only the distinct ones).

The product of its digits is 432180, while the sum is 45.

The square root of 775727613 is about 27851.8870635366. The cubic root of 775727613 is about 918.8326455156.

The spelling of 775727613 in words is "seven hundred seventy-five million, seven hundred twenty-seven thousand, six hundred thirteen".