405031423 has 4 divisors (see below), whose sum is σ = 405194608. Its totient is φ = 404868240.

The previous prime is 405031397. The next prime is 405031441. The reversal of 405031423 is 324130504.

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 405031423 - 2²¹ = 402934271 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405031394 and 405031403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405011423) 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, 77811 + ... + 82852.

It is an arithmetic number, because the mean of its divisors is an integer number (101298652).

Almost surely, 2^405031423 is an apocalyptic number.

405031423 is a deficient number, since it is larger than the sum of its proper divisors (163185).

405031423 is a wasteful number, since it uses less digits than its factorization.

405031423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163184.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 405031423 is about 20125.3924930671. The cubic root of 405031423 is about 739.8827565653.

Adding to 405031423 its reverse (324130504), we get a palindrome (729161927).

The spelling of 405031423 in words is "four hundred five million, thirty-one thousand, four hundred twenty-three".