404093381 has 2 divisors, whose sum is σ = 404093382. Its totient is φ = 404093380.

The previous prime is 404093377. The next prime is 404093449. The reversal of 404093381 is 183390404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398641156 + 5452225 = 19966^2 + 2335^2 .

It is a cyclic number.

It is not a de Polignac number, because 404093381 - 2² = 404093377 is a prime.

It is a super-2 number, since 2×404093381² = 326582921136022322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404093321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202046690 + 202046691.

It is an arithmetic number, because the mean of its divisors is an integer number (202046691).

Almost surely, 2^404093381 is an apocalyptic number.

It is an amenable number.

404093381 is a deficient number, since it is larger than the sum of its proper divisors (1).

404093381 is an equidigital number, since it uses as much as digits as its factorization.

404093381 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 32.

The square root of 404093381 is about 20102.0740472221. The cubic root of 404093381 is about 739.3111321222.

The spelling of 404093381 in words is "four hundred four million, ninety-three thousand, three hundred eighty-one".