1304431133 has 4 divisors (see below), whose sum is σ = 1306016928. Its totient is φ = 1302845340.

The previous prime is 1304431127. The next prime is 1304431147. The reversal of 1304431133 is 3311344031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3311344031 = 17 ⋅194784943.

It is a cyclic number.

It is not a de Polignac number, because 1304431133 - 2⁶ = 1304431069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1304431099 and 1304431108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304431103) 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, 791663 + ... + 793308.

It is an arithmetic number, because the mean of its divisors is an integer number (326504232).

Almost surely, 2^1304431133 is an apocalyptic number.

It is an amenable number.

1304431133 is a deficient number, since it is larger than the sum of its proper divisors (1585795).

1304431133 is an equidigital number, since it uses as much as digits as its factorization.

1304431133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585794.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 1304431133 is about 36116.9092393023. The cubic root of 1304431133 is about 1092.6315042598.

Adding to 1304431133 its reverse (3311344031), we get a palindrome (4615775164).

The spelling of 1304431133 in words is "one billion, three hundred four million, four hundred thirty-one thousand, one hundred thirty-three".