404367181 has 2 divisors, whose sum is σ = 404367182. Its totient is φ = 404367180.

The previous prime is 404367169. The next prime is 404367211. The reversal of 404367181 is 181763404.

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., 365192100 + 39175081 = 19110^2 + 6259^2 .

It is a cyclic number.

It is not a de Polignac number, because 404367181 - 2⁷ = 404367053 is a prime.

It is a super-2 number, since 2×404367181² = 327025634139773522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404367121) 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, 202183590 + 202183591.

It is an arithmetic number, because the mean of its divisors is an integer number (202183591).

Almost surely, 2^404367181 is an apocalyptic number.

It is an amenable number.

404367181 is a deficient number, since it is larger than the sum of its proper divisors (1).

404367181 is an equidigital number, since it uses as much as digits as its factorization.

404367181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 404367181 is about 20108.8831365643. The cubic root of 404367181 is about 739.4780718250.

The spelling of 404367181 in words is "four hundred four million, three hundred sixty-seven thousand, one hundred eighty-one".