406984181 has 2 divisors, whose sum is σ = 406984182. Its totient is φ = 406984180.

The previous prime is 406984159. The next prime is 406984187. The reversal of 406984181 is 181489604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399640081 + 7344100 = 19991^2 + 2710^2 .

It is a cyclic number.

It is not a de Polignac number, because 406984181 - 2¹⁴ = 406967797 is a prime.

It is a super-2 number, since 2×406984181² = 331272247168481522, 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 (406984187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203492090 + 203492091.

It is an arithmetic number, because the mean of its divisors is an integer number (203492091).

Almost surely, 2^406984181 is an apocalyptic number.

It is an amenable number.

406984181 is a deficient number, since it is larger than the sum of its proper divisors (1).

406984181 is an equidigital number, since it uses as much as digits as its factorization.

406984181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 406984181 is about 20173.8489386631. The cubic root of 406984181 is about 741.0699041591.

The spelling of 406984181 in words is "four hundred six million, nine hundred eighty-four thousand, one hundred eighty-one".