1304440133 has 4 divisors (see below), whose sum is σ = 1336255788. Its totient is φ = 1272624480.

The previous prime is 1304440129. The next prime is 1304440171. The reversal of 1304440133 is 3310444031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3310444031 = 383 ⋅8643457.

It can be written as a sum of positive squares in 2 ways, for example, as 152720164 + 1151719969 = 12358^2 + 33937^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304440133 - 2² = 1304440129 is a prime.

It is a super-4 number, since 4×1304440133⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1304440099 and 1304440108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304440183) 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 3 ways as a sum of consecutive naturals, for example, 15907766 + ... + 15907847.

It is an arithmetic number, because the mean of its divisors is an integer number (334063947).

Almost surely, 2^1304440133 is an apocalyptic number.

It is an amenable number.

1304440133 is a deficient number, since it is larger than the sum of its proper divisors (31815655).

1304440133 is an equidigital number, since it uses as much as digits as its factorization.

1304440133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31815654.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1304440133 is about 36117.0338344665. The cubic root of 1304440133 is about 1092.6340171460.

Adding to 1304440133 its reverse (3310444031), we get a palindrome (4614884164).

The spelling of 1304440133 in words is "one billion, three hundred four million, four hundred forty thousand, one hundred thirty-three".