774728873 has 2 divisors, whose sum is σ = 774728874. Its totient is φ = 774728872.

The previous prime is 774728869. The next prime is 774728909. The reversal of 774728873 is 378827477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 434805904 + 339922969 = 20852^2 + 18437^2 .

It is a cyclic number.

It is not a de Polignac number, because 774728873 - 2² = 774728869 is a prime.

It is not a weakly prime, because it can be changed into another prime (774728473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387364436 + 387364437.

It is an arithmetic number, because the mean of its divisors is an integer number (387364437).

Almost surely, 2^774728873 is an apocalyptic number.

It is an amenable number.

774728873 is a deficient number, since it is larger than the sum of its proper divisors (1).

774728873 is an equidigital number, since it uses as much as digits as its factorization.

774728873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3687936, while the sum is 53.

The square root of 774728873 is about 27833.9518035079. The cubic root of 774728873 is about 918.4381474922.

The spelling of 774728873 in words is "seven hundred seventy-four million, seven hundred twenty-eight thousand, eight hundred seventy-three".