1304400043 has 2 divisors, whose sum is σ = 1304400044. Its totient is φ = 1304400042.

The previous prime is 1304400011. The next prime is 1304400059. The reversal of 1304400043 is 3400044031.

It is a strong prime.

It is an emirp because it is prime and its reverse (3400044031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1304400043 - 2⁵ = 1304400011 is a prime.

It is not a weakly prime, because it can be changed into another prime (1304400443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652200021 + 652200022.

It is an arithmetic number, because the mean of its divisors is an integer number (652200022).

Almost surely, 2^1304400043 is an apocalyptic number.

1304400043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304400043 is an equidigital number, since it uses as much as digits as its factorization.

1304400043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1304400043 is about 36116.4788289224. The cubic root of 1304400043 is about 1092.6228235452.

Adding to 1304400043 its reverse (3400044031), we get a palindrome (4704444074).

The spelling of 1304400043 in words is "one billion, three hundred four million, four hundred thousand, forty-three".