725978171 has 2 divisors, whose sum is σ = 725978172. Its totient is φ = 725978170.

The previous prime is 725978131. The next prime is 725978237. The reversal of 725978171 is 171879527.

725978171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (171879527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 725978171 - 2⁶ = 725978107 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (725978111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362989085 + 362989086.

It is an arithmetic number, because the mean of its divisors is an integer number (362989086).

Almost surely, 2^725978171 is an apocalyptic number.

725978171 is a deficient number, since it is larger than the sum of its proper divisors (1).

725978171 is an equidigital number, since it uses as much as digits as its factorization.

725978171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246960, while the sum is 47.

The square root of 725978171 is about 26943.9820924822. The cubic root of 725978171 is about 898.7547267598.

The spelling of 725978171 in words is "seven hundred twenty-five million, nine hundred seventy-eight thousand, one hundred seventy-one".