404342023 has 2 divisors, whose sum is σ = 404342024. Its totient is φ = 404342022.

The previous prime is 404342017. The next prime is 404342033. The reversal of 404342023 is 320243404.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404342023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 404341985 and 404342003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404342033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202171011 + 202171012.

It is an arithmetic number, because the mean of its divisors is an integer number (202171012).

Almost surely, 2^404342023 is an apocalyptic number.

404342023 is a deficient number, since it is larger than the sum of its proper divisors (1).

404342023 is an equidigital number, since it uses as much as digits as its factorization.

404342023 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 22.

The square root of 404342023 is about 20108.2575823963. The cubic root of 404342023 is about 739.4627357839.

Adding to 404342023 its reverse (320243404), we get a palindrome (724585427).

The spelling of 404342023 in words is "four hundred four million, three hundred forty-two thousand, twenty-three".