723181 has 2 divisors, whose sum is σ = 723182. Its totient is φ = 723180.

The previous prime is 723169. The next prime is 723193. The reversal of 723181 is 181327.

723181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (723169) and next prime (723193).

It can be written as a sum of positive squares in only one way, i.e., 656100 + 67081 = 810^2 + 259^2 .

It is a cyclic number.

It is not a de Polignac number, because 723181 - 2⁷ = 723053 is a prime.

It is a super-2 number, since 2×723181² = 1045981517522, which contains 22 as substring.

It is a Chen prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361590 + 361591.

It is an arithmetic number, because the mean of its divisors is an integer number (361591).

2⁷²³¹⁸¹ is an apocalyptic number.

It is an amenable number.

723181 is a deficient number, since it is larger than the sum of its proper divisors (1).

723181 is an equidigital number, since it uses as much as digits as its factorization.

723181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 22.

The square root of 723181 is about 850.4004938851. The cubic root of 723181 is about 89.7598949889.

The spelling of 723181 in words is "seven hundred twenty-three thousand, one hundred eighty-one".