664203431 has 8 divisors (see below), whose sum is σ = 672048000. Its totient is φ = 656385912.

The previous prime is 664203401. The next prime is 664203451. The reversal of 664203431 is 134302466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664203431 is a prime.

It is a super-2 number, since 2×664203431² = 882332395504343522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664203394 and 664203403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664203401) 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 7 ways as a sum of consecutive naturals, for example, 44936 + ... + 57858.

It is an arithmetic number, because the mean of its divisors is an integer number (84006000).

Almost surely, 2^664203431 is an apocalyptic number.

664203431 is a deficient number, since it is larger than the sum of its proper divisors (7844569).

664203431 is a wasteful number, since it uses less digits than its factorization.

664203431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13525.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 664203431 is about 25772.1444780988. The cubic root of 664203431 is about 872.5032196114.

Adding to 664203431 its reverse (134302466), we get a palindrome (798505897).

The spelling of 664203431 in words is "six hundred sixty-four million, two hundred three thousand, four hundred thirty-one".