725711813 has 2 divisors, whose sum is σ = 725711814. Its totient is φ = 725711812.

The previous prime is 725711743. The next prime is 725711843. The reversal of 725711813 is 318117527.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 718132804 + 7579009 = 26798^2 + 2753^2 .

It is a cyclic number.

It is not a de Polignac number, because 725711813 - 2¹⁴ = 725695429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725711843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362855906 + 362855907.

It is an arithmetic number, because the mean of its divisors is an integer number (362855907).

Almost surely, 2^725711813 is an apocalyptic number.

It is an amenable number.

725711813 is a deficient number, since it is larger than the sum of its proper divisors (1).

725711813 is an equidigital number, since it uses as much as digits as its factorization.

725711813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 35.

The square root of 725711813 is about 26939.0388284363. The cubic root of 725711813 is about 898.6447970107.

The spelling of 725711813 in words is "seven hundred twenty-five million, seven hundred eleven thousand, eight hundred thirteen".