705488732609 has 2 divisors, whose sum is σ = 705488732610. Its totient is φ = 705488732608.

The previous prime is 705488732603. The next prime is 705488732653. The reversal of 705488732609 is 906237884507.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 616507632400 + 88981100209 = 785180^2 + 298297^2 .

It is a cyclic number.

It is not a de Polignac number, because 705488732609 - 2²⁸ = 705220297153 is a prime.

It is not a weakly prime, because it can be changed into another prime (705488732603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352744366304 + 352744366305.

It is an arithmetic number, because the mean of its divisors is an integer number (352744366305).

Almost surely, 2^705488732609 is an apocalyptic number.

It is an amenable number.

705488732609 is a deficient number, since it is larger than the sum of its proper divisors (1).

705488732609 is an equidigital number, since it uses as much as digits as its factorization.

705488732609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20321280, while the sum is 59.

The spelling of 705488732609 in words is "seven hundred five billion, four hundred eighty-eight million, seven hundred thirty-two thousand, six hundred nine".