722500609 has 2 divisors, whose sum is σ = 722500610. Its totient is φ = 722500608.

The previous prime is 722500549. The next prime is 722500619. The reversal of 722500609 is 906005227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 396806400 + 325694209 = 19920^2 + 18047^2 .

It is a cyclic number.

It is not a de Polignac number, because 722500609 - 2⁷ = 722500481 is a prime.

It is not a weakly prime, because it can be changed into another prime (722500619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361250304 + 361250305.

It is an arithmetic number, because the mean of its divisors is an integer number (361250305).

Almost surely, 2^722500609 is an apocalyptic number.

It is an amenable number.

722500609 is a deficient number, since it is larger than the sum of its proper divisors (1).

722500609 is an equidigital number, since it uses as much as digits as its factorization.

722500609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 722500609 is about 26879.3714398235. The cubic root of 722500609 is about 897.3173652994.

The spelling of 722500609 in words is "seven hundred twenty-two million, five hundred thousand, six hundred nine".