721482529 has 2 divisors, whose sum is σ = 721482530. Its totient is φ = 721482528.

The previous prime is 721482521. The next prime is 721482539. The reversal of 721482529 is 925284127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 715455504 + 6027025 = 26748^2 + 2455^2 .

It is a cyclic number.

It is not a de Polignac number, because 721482529 - 2³ = 721482521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 721482491 and 721482500.

It is not a weakly prime, because it can be changed into another prime (721482521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360741264 + 360741265.

It is an arithmetic number, because the mean of its divisors is an integer number (360741265).

Almost surely, 2^721482529 is an apocalyptic number.

It is an amenable number.

721482529 is a deficient number, since it is larger than the sum of its proper divisors (1).

721482529 is an equidigital number, since it uses as much as digits as its factorization.

721482529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 721482529 is about 26860.4268208828. The cubic root of 721482529 is about 896.8956953935.

The spelling of 721482529 in words is "seven hundred twenty-one million, four hundred eighty-two thousand, five hundred twenty-nine".