404122123 has 2 divisors, whose sum is σ = 404122124. Its totient is φ = 404122122.

The previous prime is 404122097. The next prime is 404122129. The reversal of 404122123 is 321221404.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404122123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404122123.

It is not a weakly prime, because it can be changed into another prime (404122129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202061061 + 202061062.

It is an arithmetic number, because the mean of its divisors is an integer number (202061062).

Almost surely, 2^404122123 is an apocalyptic number.

404122123 is a deficient number, since it is larger than the sum of its proper divisors (1).

404122123 is an equidigital number, since it uses as much as digits as its factorization.

404122123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 404122123 is about 20102.7889358666. The cubic root of 404122123 is about 739.3286600649.

Adding to 404122123 its reverse (321221404), we get a palindrome (725343527).

The spelling of 404122123 in words is "four hundred four million, one hundred twenty-two thousand, one hundred twenty-three".