725679181 has 2 divisors, whose sum is σ = 725679182. Its totient is φ = 725679180.

The previous prime is 725679167. The next prime is 725679257. The reversal of 725679181 is 181976527.

It is a happy number.

725679181 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 can be written as a sum of positive squares in only one way, i.e., 710702281 + 14976900 = 26659^2 + 3870^2 .

It is a cyclic number.

It is not a de Polignac number, because 725679181 - 2²¹ = 723582029 is a prime.

It is a super-2 number, since 2×725679181² = 1053220547473661522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725679161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362839590 + 362839591.

It is an arithmetic number, because the mean of its divisors is an integer number (362839591).

Almost surely, 2^725679181 is an apocalyptic number.

It is an amenable number.

725679181 is a deficient number, since it is larger than the sum of its proper divisors (1).

725679181 is an equidigital number, since it uses as much as digits as its factorization.

725679181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 46.

The square root of 725679181 is about 26938.4331578509. The cubic root of 725679181 is about 898.6313274690.

The spelling of 725679181 in words is "seven hundred twenty-five million, six hundred seventy-nine thousand, one hundred eighty-one".