1304431663 has 8 divisors (see below), whose sum is σ = 1316980368. Its totient is φ = 1291927104.

The previous prime is 1304431631. The next prime is 1304431669. The reversal of 1304431663 is 3661344031.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1304431663 - 2⁵ = 1304431631 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 (1304431669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49945 + ... + 71437.

It is an arithmetic number, because the mean of its divisors is an integer number (164622546).

Almost surely, 2^1304431663 is an apocalyptic number.

1304431663 is a deficient number, since it is larger than the sum of its proper divisors (12548705).

1304431663 is a wasteful number, since it uses less digits than its factorization.

1304431663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22073.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 1304431663 is about 36116.9165765850. The cubic root of 1304431663 is about 1092.6316522412.

Adding to 1304431663 its reverse (3661344031), we get a palindrome (4965775694).

The spelling of 1304431663 in words is "one billion, three hundred four million, four hundred thirty-one thousand, six hundred sixty-three".