725844331 has 2 divisors, whose sum is σ = 725844332. Its totient is φ = 725844330.

The previous prime is 725844253. The next prime is 725844349. The reversal of 725844331 is 133448527.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (133448527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 725844331 - 2¹⁵ = 725811563 is a prime.

It is a super-2 number, since 2×725844331² = 1053699985689675122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (725844391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362922165 + 362922166.

It is an arithmetic number, because the mean of its divisors is an integer number (362922166).

Almost surely, 2^725844331 is an apocalyptic number.

725844331 is a deficient number, since it is larger than the sum of its proper divisors (1).

725844331 is an equidigital number, since it uses as much as digits as its factorization.

725844331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 37.

The square root of 725844331 is about 26941.4983065159. The cubic root of 725844331 is about 898.6994924427.

The spelling of 725844331 in words is "seven hundred twenty-five million, eight hundred forty-four thousand, three hundred thirty-one".