725390593 has 2 divisors, whose sum is σ = 725390594. Its totient is φ = 725390592.

The previous prime is 725390579. The next prime is 725390609. The reversal of 725390593 is 395093527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 454030864 + 271359729 = 21308^2 + 16473^2 .

It is an emirp because it is prime and its reverse (395093527) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725390593 is a prime.

It is not a weakly prime, because it can be changed into another prime (725390503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362695296 + 362695297.

It is an arithmetic number, because the mean of its divisors is an integer number (362695297).

Almost surely, 2^725390593 is an apocalyptic number.

It is an amenable number.

725390593 is a deficient number, since it is larger than the sum of its proper divisors (1).

725390593 is an equidigital number, since it uses as much as digits as its factorization.

725390593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 255150, while the sum is 43.

The square root of 725390593 is about 26933.0761889540. The cubic root of 725390593 is about 898.5121891458.

The spelling of 725390593 in words is "seven hundred twenty-five million, three hundred ninety thousand, five hundred ninety-three".