724528081 has 2 divisors, whose sum is σ = 724528082. Its totient is φ = 724528080.

The previous prime is 724528067. The next prime is 724528093. The reversal of 724528081 is 180825427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 699126481 + 25401600 = 26441^2 + 5040^2 .

It is a cyclic number.

It is not a de Polignac number, because 724528081 - 2⁹ = 724527569 is a prime.

It is a super-2 number, since 2×724528081² = 1049881880315085122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 724528081.

It is not a weakly prime, because it can be changed into another prime (724528481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362264040 + 362264041.

It is an arithmetic number, because the mean of its divisors is an integer number (362264041).

Almost surely, 2^724528081 is an apocalyptic number.

It is an amenable number.

724528081 is a deficient number, since it is larger than the sum of its proper divisors (1).

724528081 is an equidigital number, since it uses as much as digits as its factorization.

724528081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 724528081 is about 26917.0592933181. The cubic root of 724528081 is about 898.1559282507.

The spelling of 724528081 in words is "seven hundred twenty-four million, five hundred twenty-eight thousand, eighty-one".