725405029 has 2 divisors, whose sum is σ = 725405030. Its totient is φ = 725405028.

The previous prime is 725404997. The next prime is 725405039. The reversal of 725405029 is 920504527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 557054404 + 168350625 = 23602^2 + 12975^2 .

It is an emirp because it is prime and its reverse (920504527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 725405029 - 2⁵ = 725404997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 725404985 and 725405003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725405039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362702514 + 362702515.

It is an arithmetic number, because the mean of its divisors is an integer number (362702515).

Almost surely, 2^725405029 is an apocalyptic number.

It is an amenable number.

725405029 is a deficient number, since it is larger than the sum of its proper divisors (1).

725405029 is an equidigital number, since it uses as much as digits as its factorization.

725405029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 725405029 is about 26933.3441852288. The cubic root of 725405029 is about 898.5181495374.

The spelling of 725405029 in words is "seven hundred twenty-five million, four hundred five thousand, twenty-nine".