634181 has 2 divisors, whose sum is σ = 634182. Its totient is φ = 634180.

The previous prime is 634177. The next prime is 634187. The reversal of 634181 is 181436.

634181 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., 616225 + 17956 = 785^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 634181 - 2² = 634177 is a prime.

It is a super-2 number, since 2×634181² = 804371081522, which contains 22 as substring.

It is a Chen prime.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 634181.

It is not a weakly prime, because it can be changed into another prime (634187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317090 + 317091.

It is an arithmetic number, because the mean of its divisors is an integer number (317091).

2⁶³⁴¹⁸¹ is an apocalyptic number.

It is an amenable number.

634181 is a deficient number, since it is larger than the sum of its proper divisors (1).

634181 is an equidigital number, since it uses as much as digits as its factorization.

634181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 634181 is about 796.3548204161. The cubic root of 634181 is about 85.9154116896.

The spelling of 634181 in words is "six hundred thirty-four thousand, one hundred eighty-one".