404240323 has 2 divisors, whose sum is σ = 404240324. Its totient is φ = 404240322.

The previous prime is 404240299. The next prime is 404240339. The reversal of 404240323 is 323042404.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404240323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 404240294 and 404240303.

It is not a weakly prime, because it can be changed into another prime (404240383) 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, 202120161 + 202120162.

It is an arithmetic number, because the mean of its divisors is an integer number (202120162).

Almost surely, 2^404240323 is an apocalyptic number.

404240323 is a deficient number, since it is larger than the sum of its proper divisors (1).

404240323 is an equidigital number, since it uses as much as digits as its factorization.

404240323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 404240323 is about 20105.7286115177. The cubic root of 404240323 is about 739.4007340940.

Adding to 404240323 its reverse (323042404), we get a palindrome (727282727).

The spelling of 404240323 in words is "four hundred four million, two hundred forty thousand, three hundred twenty-three".