723985849 has 2 divisors, whose sum is σ = 723985850. Its totient is φ = 723985848.

The previous prime is 723985837. The next prime is 723985891. The reversal of 723985849 is 948589327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 404291449 + 319694400 = 20107^2 + 17880^2 .

It is a cyclic number.

It is not a de Polignac number, because 723985849 - 2⁹ = 723985337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 723985849.

It is not a weakly prime, because it can be changed into another prime (723985819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361992924 + 361992925.

It is an arithmetic number, because the mean of its divisors is an integer number (361992925).

Almost surely, 2^723985849 is an apocalyptic number.

It is an amenable number.

723985849 is a deficient number, since it is larger than the sum of its proper divisors (1).

723985849 is an equidigital number, since it uses as much as digits as its factorization.

723985849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 55.

The square root of 723985849 is about 26906.9851339759. The cubic root of 723985849 is about 897.9318143574.

The spelling of 723985849 in words is "seven hundred twenty-three million, nine hundred eighty-five thousand, eight hundred forty-nine".