1304440057 has 2 divisors, whose sum is σ = 1304440058. Its totient is φ = 1304440056.

The previous prime is 1304440037. The next prime is 1304440063. The reversal of 1304440057 is 7500444031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1224230121 + 80209936 = 34989^2 + 8956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1304440057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1304440037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652220028 + 652220029.

It is an arithmetic number, because the mean of its divisors is an integer number (652220029).

Almost surely, 2^1304440057 is an apocalyptic number.

It is an amenable number.

1304440057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304440057 is an equidigital number, since it uses as much as digits as its factorization.

1304440057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 1304440057 is about 36117.0327823314. The cubic root of 1304440057 is about 1092.6339959261.

Adding to 1304440057 its reverse (7500444031), we get a palindrome (8804884088).

The spelling of 1304440057 in words is "one billion, three hundred four million, four hundred forty thousand, fifty-seven".