725234309 has 2 divisors, whose sum is σ = 725234310. Its totient is φ = 725234308.

The previous prime is 725234303. The next prime is 725234327. The reversal of 725234309 is 903432527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 725224900 + 9409 = 26930^2 + 97^2 .

It is an emirp because it is prime and its reverse (903432527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 725234309 - 2⁸ = 725234053 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725234303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362617154 + 362617155.

It is an arithmetic number, because the mean of its divisors is an integer number (362617155).

Almost surely, 2^725234309 is an apocalyptic number.

It is an amenable number.

725234309 is a deficient number, since it is larger than the sum of its proper divisors (1).

725234309 is an equidigital number, since it uses as much as digits as its factorization.

725234309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 725234309 is about 26930.1746930836. The cubic root of 725234309 is about 898.4476569401.

The spelling of 725234309 in words is "seven hundred twenty-five million, two hundred thirty-four thousand, three hundred nine".