725528291 has 2 divisors, whose sum is σ = 725528292. Its totient is φ = 725528290.

The previous prime is 725528269. The next prime is 725528303. The reversal of 725528291 is 192825527.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 725528291 - 2¹⁸ = 725266147 is a prime.

It is not a weakly prime, because it can be changed into another prime (725528201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362764145 + 362764146.

It is an arithmetic number, because the mean of its divisors is an integer number (362764146).

Almost surely, 2^725528291 is an apocalyptic number.

725528291 is a deficient number, since it is larger than the sum of its proper divisors (1).

725528291 is an equidigital number, since it uses as much as digits as its factorization.

725528291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 41.

The square root of 725528291 is about 26935.6323668111. The cubic root of 725528291 is about 898.5690392092.

The spelling of 725528291 in words is "seven hundred twenty-five million, five hundred twenty-eight thousand, two hundred ninety-one".