405320343423 has 4 divisors (see below), whose sum is σ = 540427124568. Its totient is φ = 270213562280.

The previous prime is 405320343419. The next prime is 405320343427. The reversal of 405320343423 is 324343023504.

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

It is an interprime number because it is at equal distance from previous prime (405320343419) and next prime (405320343427).

It is a cyclic number.

It is not a de Polignac number, because 405320343423 - 2² = 405320343419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405320343427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67553390568 + ... + 67553390573.

It is an arithmetic number, because the mean of its divisors is an integer number (135106781142).

Almost surely, 2^405320343423 is an apocalyptic number.

405320343423 is a deficient number, since it is larger than the sum of its proper divisors (135106781145).

405320343423 is a wasteful number, since it uses less digits than its factorization.

405320343423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135106781144.

The product of its (nonzero) digits is 103680, while the sum is 33.

Adding to 405320343423 its reverse (324343023504), we get a palindrome (729663366927).

The spelling of 405320343423 in words is "four hundred five billion, three hundred twenty million, three hundred forty-three thousand, four hundred twenty-three".