1304433131 has 4 divisors (see below), whose sum is σ = 1322302152. Its totient is φ = 1286564112.

The previous prime is 1304433101. The next prime is 1304433149. The reversal of 1304433131 is 1313344031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1313344031 = 983 ⋅1336057.

It is a cyclic number.

It is not a de Polignac number, because 1304433131 - 2²⁶ = 1237324267 is a prime.

It is a super-2 number, since 2×1304433131² = 3403091586500926322, 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 = 1304433097 and 1304433106.

It is not an unprimeable number, because it can be changed into a prime (1304433101) 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, 8934401 + ... + 8934546.

It is an arithmetic number, because the mean of its divisors is an integer number (330575538).

Almost surely, 2^1304433131 is an apocalyptic number.

1304433131 is a deficient number, since it is larger than the sum of its proper divisors (17869021).

1304433131 is an equidigital number, since it uses as much as digits as its factorization.

1304433131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17869020.

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

The square root of 1304433131 is about 36116.9368994659. The cubic root of 1304433131 is about 1092.6320621216.

Adding to 1304433131 its reverse (1313344031), we get a palindrome (2617777162).

The spelling of 1304433131 in words is "one billion, three hundred four million, four hundred thirty-three thousand, one hundred thirty-one".