404432123 has 4 divisors (see below), whose sum is σ = 404559480. Its totient is φ = 404304768.

The previous prime is 404432111. The next prime is 404432137. The reversal of 404432123 is 321234404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 404432123 - 2⁶ = 404432059 is a prime.

It is a super-2 number, since 2×404432123² = 327130684228574258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404432143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58790 + ... + 65307.

It is an arithmetic number, because the mean of its divisors is an integer number (101139870).

Almost surely, 2^404432123 is an apocalyptic number.

404432123 is a deficient number, since it is larger than the sum of its proper divisors (127357).

404432123 is a wasteful number, since it uses less digits than its factorization.

404432123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127356.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 404432123 is about 20110.4978307351. The cubic root of 404432123 is about 739.5176568166.

Adding to 404432123 its reverse (321234404), we get a palindrome (725666527).

The spelling of 404432123 in words is "four hundred four million, four hundred thirty-two thousand, one hundred twenty-three".