1304391043 has 2 divisors, whose sum is σ = 1304391044. Its totient is φ = 1304391042.

The previous prime is 1304390993. The next prime is 1304391103. The reversal of 1304391043 is 3401934031.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1304391043 is a prime.

It is not a weakly prime, because it can be changed into another prime (1304391943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652195521 + 652195522.

It is an arithmetic number, because the mean of its divisors is an integer number (652195522).

Almost surely, 2^1304391043 is an apocalyptic number.

1304391043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304391043 is an equidigital number, since it uses as much as digits as its factorization.

1304391043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 1304391043 is about 36116.3542318435. The cubic root of 1304391043 is about 1092.6203106075.

The spelling of 1304391043 in words is "one billion, three hundred four million, three hundred ninety-one thousand, forty-three".