405123393 has 4 divisors (see below), whose sum is σ = 540164528. Its totient is φ = 270082260.

The previous prime is 405123371. The next prime is 405123427. The reversal of 405123393 is 393321504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 405123393 - 2⁸ = 405123137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 405123393.

It is not an unprimeable number, because it can be changed into a prime (405123343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67520563 + ... + 67520568.

It is an arithmetic number, because the mean of its divisors is an integer number (135041132).

Almost surely, 2^405123393 is an apocalyptic number.

It is an amenable number.

405123393 is a deficient number, since it is larger than the sum of its proper divisors (135041135).

405123393 is a wasteful number, since it uses less digits than its factorization.

405123393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135041134.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 405123393 is about 20127.6772877548. The cubic root of 405123393 is about 739.9387537575.

Adding to 405123393 its reverse (393321504), we get a palindrome (798444897).

The spelling of 405123393 in words is "four hundred five million, one hundred twenty-three thousand, three hundred ninety-three".