423404431 has 16 divisors (see below), whose sum is σ = 463095360. Its totient is φ = 385482240.

The previous prime is 423404393. The next prime is 423404459. The reversal of 423404431 is 134404324.

It is a cyclic number.

It is not a de Polignac number, because 423404431 - 2¹¹ = 423402383 is a prime.

It is a super-2 number, since 2×423404431² = 358542624380867522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423404396 and 423404405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423404461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111990 + ... + 115708.

It is an arithmetic number, because the mean of its divisors is an integer number (28943460).

Almost surely, 2^423404431 is an apocalyptic number.

423404431 is a deficient number, since it is larger than the sum of its proper divisors (39690929).

423404431 is a wasteful number, since it uses less digits than its factorization.

423404431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3954.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 423404431 is about 20576.7935062779. The cubic root of 423404431 is about 750.9052364379.

Adding to 423404431 its reverse (134404324), we get a palindrome (557808755).

The spelling of 423404431 in words is "four hundred twenty-three million, four hundred four thousand, four hundred thirty-one".