775554449 has 2 divisors, whose sum is σ = 775554450. Its totient is φ = 775554448.

The previous prime is 775554421. The next prime is 775554463. The reversal of 775554449 is 944455577.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 393625600 + 381928849 = 19840^2 + 19543^2 .

It is a cyclic number.

It is not a de Polignac number, because 775554449 - 2⁸ = 775554193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 775554397 and 775554406.

It is not a weakly prime, because it can be changed into another prime (775554349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387777224 + 387777225.

It is an arithmetic number, because the mean of its divisors is an integer number (387777225).

Almost surely, 2^775554449 is an apocalyptic number.

It is an amenable number.

775554449 is a deficient number, since it is larger than the sum of its proper divisors (1).

775554449 is an equidigital number, since it uses as much as digits as its factorization.

775554449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528000, while the sum is 50.

The square root of 775554449 is about 27848.7782317286. The cubic root of 775554449 is about 918.7642707518.

The spelling of 775554449 in words is "seven hundred seventy-five million, five hundred fifty-four thousand, four hundred forty-nine".