400430003423 has 4 divisors (see below), whose sum is σ = 409742329128. Its totient is φ = 391117677720.

The previous prime is 400430003417. The next prime is 400430003443. The reversal of 400430003423 is 324300034004.

It is a happy number.

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-400430003423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400430003443) 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, 4656162788 + ... + 4656162873.

It is an arithmetic number, because the mean of its divisors is an integer number (102435582282).

Almost surely, 2^400430003423 is an apocalyptic number.

400430003423 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

400430003423 is a deficient number, since it is larger than the sum of its proper divisors (9312325705).

400430003423 is an equidigital number, since it uses as much as digits as its factorization.

400430003423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9312325704.

The product of its (nonzero) digits is 3456, while the sum is 23.

Adding to 400430003423 its reverse (324300034004), we get a palindrome (724730037427).

The spelling of 400430003423 in words is "four hundred billion, four hundred thirty million, three thousand, four hundred twenty-three".