501400423 has 4 divisors (see below), whose sum is σ = 502327768. Its totient is φ = 500473080.

The previous prime is 501400399. The next prime is 501400429. The reversal of 501400423 is 324004105.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501400423 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 501400423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501400429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462861 + ... + 463942.

It is an arithmetic number, because the mean of its divisors is an integer number (125581942).

Almost surely, 2^501400423 is an apocalyptic number.

501400423 is a deficient number, since it is larger than the sum of its proper divisors (927345).

501400423 is an equidigital number, since it uses as much as digits as its factorization.

501400423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927344.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 501400423 is about 22391.9722891933. The cubic root of 501400423 is about 794.4408462205.

Adding to 501400423 its reverse (324004105), we get a palindrome (825404528).

The spelling of 501400423 in words is "five hundred one million, four hundred thousand, four hundred twenty-three".