725855489 has 2 divisors, whose sum is σ = 725855490. Its totient is φ = 725855488.

The previous prime is 725855479. The next prime is 725855491. The reversal of 725855489 is 984558527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 717329089 + 8526400 = 26783^2 + 2920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725855489 is a prime.

It is a super-2 number, since 2×725855489² = 1053732381822858242, which contains 22 as substring.

Together with 725855491, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 725855489.

It is not a weakly prime, because it can be changed into another prime (725855479) 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, 362927744 + 362927745.

It is an arithmetic number, because the mean of its divisors is an integer number (362927745).

Almost surely, 2^725855489 is an apocalyptic number.

It is an amenable number.

725855489 is a deficient number, since it is larger than the sum of its proper divisors (1).

725855489 is an equidigital number, since it uses as much as digits as its factorization.

725855489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032000, while the sum is 53.

The square root of 725855489 is about 26941.7053840324. The cubic root of 725855489 is about 898.7040974878.

The spelling of 725855489 in words is "seven hundred twenty-five million, eight hundred fifty-five thousand, four hundred eighty-nine".