404119981 has 2 divisors, whose sum is σ = 404119982. Its totient is φ = 404119980.

The previous prime is 404119973. The next prime is 404120021. The reversal of 404119981 is 189911404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395651881 + 8468100 = 19891^2 + 2910^2 .

It is a cyclic number.

It is not a de Polignac number, because 404119981 - 2³ = 404119973 is a prime.

It is a super-2 number, since 2×404119981² = 326625918086880722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 404119981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404119921) 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, 202059990 + 202059991.

It is an arithmetic number, because the mean of its divisors is an integer number (202059991).

Almost surely, 2^404119981 is an apocalyptic number.

It is an amenable number.

404119981 is a deficient number, since it is larger than the sum of its proper divisors (1).

404119981 is an equidigital number, since it uses as much as digits as its factorization.

404119981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 404119981 is about 20102.7356596061. The cubic root of 404119981 is about 739.3273538221.

The spelling of 404119981 in words is "four hundred four million, one hundred nineteen thousand, nine hundred eighty-one".