1304020247 has 2 divisors, whose sum is σ = 1304020248. Its totient is φ = 1304020246.

The previous prime is 1304020219. The next prime is 1304020253. The reversal of 1304020247 is 7420204031.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1304020247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1304020747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652010123 + 652010124.

It is an arithmetic number, because the mean of its divisors is an integer number (652010124).

Almost surely, 2^1304020247 is an apocalyptic number.

1304020247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304020247 is an equidigital number, since it uses as much as digits as its factorization.

1304020247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 1304020247 is about 36111.2205138514. The cubic root of 1304020247 is about 1092.5167686423.

Adding to 1304020247 its reverse (7420204031), we get a palindrome (8724224278).

The spelling of 1304020247 in words is "one billion, three hundred four million, twenty thousand, two hundred forty-seven".