723499009 has 2 divisors, whose sum is σ = 723499010. Its totient is φ = 723499008.

The previous prime is 723498953. The next prime is 723499027. The reversal of 723499009 is 900994327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 681210000 + 42289009 = 26100^2 + 6503^2 .

It is a cyclic number.

It is not a de Polignac number, because 723499009 - 2⁹ = 723498497 is a prime.

It is not a weakly prime, because it can be changed into another prime (723499409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361749504 + 361749505.

It is an arithmetic number, because the mean of its divisors is an integer number (361749505).

Almost surely, 2^723499009 is an apocalyptic number.

It is an amenable number.

723499009 is a deficient number, since it is larger than the sum of its proper divisors (1).

723499009 is an equidigital number, since it uses as much as digits as its factorization.

723499009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 723499009 is about 26897.9368911446. The cubic root of 723499009 is about 897.7304995813.

The spelling of 723499009 in words is "seven hundred twenty-three million, four hundred ninety-nine thousand, nine".