704555561 has 2 divisors, whose sum is σ = 704555562. Its totient is φ = 704555560.

The previous prime is 704555539. The next prime is 704555567. The reversal of 704555561 is 165555407.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 678289936 + 26265625 = 26044^2 + 5125^2 .

It is a cyclic number.

It is not a de Polignac number, because 704555561 - 2¹⁸ = 704293417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (704555567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352277780 + 352277781.

It is an arithmetic number, because the mean of its divisors is an integer number (352277781).

Almost surely, 2^704555561 is an apocalyptic number.

It is an amenable number.

704555561 is a deficient number, since it is larger than the sum of its proper divisors (1).

704555561 is an equidigital number, since it uses as much as digits as its factorization.

704555561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105000, while the sum is 38.

The square root of 704555561 is about 26543.4655047151. The cubic root of 704555561 is about 889.8259816316.

The spelling of 704555561 in words is "seven hundred four million, five hundred fifty-five thousand, five hundred sixty-one".