404340204123 has 12 divisors (see below), whose sum is σ = 597629449560. Its totient is φ = 263291295456.

The previous prime is 404340204119. The next prime is 404340204127. The reversal of 404340204123 is 321402043404.

It is a happy number.

404340204123 is a `hidden beast` number, since 4 + 0 + 434 + 0 + 204 + 1 + 23 = 666.

It is an interprime number because it is at equal distance from previous prime (404340204119) and next prime (404340204127).

It is not a de Polignac number, because 404340204123 - 2² = 404340204119 is a prime.

It is a super-3 number, since 3×404340204123³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (404340204127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 522402978 + ... + 522403751.

It is an arithmetic number, because the mean of its divisors is an integer number (49802454130).

Almost surely, 2^404340204123 is an apocalyptic number.

404340204123 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

404340204123 is a deficient number, since it is larger than the sum of its proper divisors (193289245437).

404340204123 is a wasteful number, since it uses less digits than its factorization.

404340204123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044806778 (or 1044806775 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 404340204123 its reverse (321402043404), we get a palindrome (725742247527).

The spelling of 404340204123 in words is "four hundred four billion, three hundred forty million, two hundred four thousand, one hundred twenty-three".