404013481 has 2 divisors, whose sum is σ = 404013482. Its totient is φ = 404013480.

The previous prime is 404013409. The next prime is 404013497. The reversal of 404013481 is 184310404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 404010000 + 3481 = 20100^2 + 59^2 .

It is a cyclic number.

It is not a de Polignac number, because 404013481 - 2⁷ = 404013353 is a prime.

It is a super-2 number, since 2×404013481² = 326453785659474722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (404011481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202006740 + 202006741.

It is an arithmetic number, because the mean of its divisors is an integer number (202006741).

Almost surely, 2^404013481 is an apocalyptic number.

It is an amenable number.

404013481 is a deficient number, since it is larger than the sum of its proper divisors (1).

404013481 is an equidigital number, since it uses as much as digits as its factorization.

404013481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 404013481 is about 20100.0865918533. The cubic root of 404013481 is about 739.2624017578.

Adding to 404013481 its reverse (184310404), we get a palindrome (588323885).

It can be divided in two parts, 40401 and 3481, that multiplied together give a square (140635881 = 11859²).

The spelling of 404013481 in words is "four hundred four million, thirteen thousand, four hundred eighty-one".