404203381 has 2 divisors, whose sum is σ = 404203382. Its totient is φ = 404203380.

The previous prime is 404203361. The next prime is 404203391. The reversal of 404203381 is 183302404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282542481 + 121660900 = 16809^2 + 11030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404203381 is a prime.

It is a super-2 number, since 2×404203381² = 326760746423662322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404203361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202101690 + 202101691.

It is an arithmetic number, because the mean of its divisors is an integer number (202101691).

Almost surely, 2^404203381 is an apocalyptic number.

It is an amenable number.

404203381 is a deficient number, since it is larger than the sum of its proper divisors (1).

404203381 is an equidigital number, since it uses as much as digits as its factorization.

404203381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 404203381 is about 20104.8098971366. The cubic root of 404203381 is about 739.3782097255.

Adding to 404203381 its reverse (183302404), we get a palindrome (587505785).

The spelling of 404203381 in words is "four hundred four million, two hundred three thousand, three hundred eighty-one".