725227729 has 2 divisors, whose sum is σ = 725227730. Its totient is φ = 725227728.

The previous prime is 725227709. The next prime is 725227793. The reversal of 725227729 is 927722527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377330625 + 347897104 = 19425^2 + 18652^2 .

It is a cyclic number.

It is not a de Polignac number, because 725227729 - 2¹¹ = 725225681 is a prime.

It is not a weakly prime, because it can be changed into another prime (725227709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362613864 + 362613865.

It is an arithmetic number, because the mean of its divisors is an integer number (362613865).

Almost surely, 2^725227729 is an apocalyptic number.

It is an amenable number.

725227729 is a deficient number, since it is larger than the sum of its proper divisors (1).

725227729 is an equidigital number, since it uses as much as digits as its factorization.

725227729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246960, while the sum is 43.

The square root of 725227729 is about 26930.0525250138. The cubic root of 725227729 is about 898.4449397477. Note that the first 3 decimals are identical.

The spelling of 725227729 in words is "seven hundred twenty-five million, two hundred twenty-seven thousand, seven hundred twenty-nine".