396181 has 2 divisors, whose sum is σ = 396182. Its totient is φ = 396180.

The previous prime is 396173. The next prime is 396197. The reversal of 396181 is 181693.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378225 + 17956 = 615^2 + 134^2 .

It is an emirp because it is prime and its reverse (181693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 396181 - 2³ = 396173 is a prime.

It is a super-2 number, since 2×396181² = 313918769522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198090 + 198091.

It is an arithmetic number, because the mean of its divisors is an integer number (198091).

2³⁹⁶¹⁸¹ is an apocalyptic number.

It is an amenable number.

396181 is a deficient number, since it is larger than the sum of its proper divisors (1).

396181 is an equidigital number, since it uses as much as digits as its factorization.

396181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 28.

The square root of 396181 is about 629.4291064131. The cubic root of 396181 is about 73.4453911243.

The spelling of 396181 in words is "three hundred ninety-six thousand, one hundred eighty-one".