1297305533 has 2 divisors, whose sum is σ = 1297305534. Its totient is φ = 1297305532.

The previous prime is 1297305481. The next prime is 1297305553. The reversal of 1297305533 is 3355037921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1021313764 + 275991769 = 31958^2 + 16613^2 .

It is an emirp because it is prime and its reverse (3355037921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1297305533 - 2⁶ = 1297305469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297305553) 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, 648652766 + 648652767.

It is an arithmetic number, because the mean of its divisors is an integer number (648652767).

Almost surely, 2^1297305533 is an apocalyptic number.

It is an amenable number.

1297305533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297305533 is an equidigital number, since it uses as much as digits as its factorization.

1297305533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 85050, while the sum is 38.

The square root of 1297305533 is about 36018.1278386315. The cubic root of 1297305533 is about 1090.6383301989.

The spelling of 1297305533 in words is "one billion, two hundred ninety-seven million, three hundred five thousand, five hundred thirty-three".