725785757 has 4 divisors (see below), whose sum is σ = 725977980. Its totient is φ = 725593536.

The previous prime is 725785721. The next prime is 725785789. The reversal of 725785757 is 757587527.

725785757 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 757587527 = 251 ⋅3018277.

It can be written as a sum of positive squares in 2 ways, for example, as 680479396 + 45306361 = 26086^2 + 6731^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725785757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 725785699 and 725785708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725785717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90332 + ... + 98037.

It is an arithmetic number, because the mean of its divisors is an integer number (181494495).

Almost surely, 2^725785757 is an apocalyptic number.

It is an amenable number.

725785757 is a deficient number, since it is larger than the sum of its proper divisors (192223).

725785757 is a wasteful number, since it uses less digits than its factorization.

725785757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192222.

The product of its digits is 4802000, while the sum is 53.

The square root of 725785757 is about 26940.4112255177. The cubic root of 725785757 is about 898.6753174519.

The spelling of 725785757 in words is "seven hundred twenty-five million, seven hundred eighty-five thousand, seven hundred fifty-seven".