1297343213 has 2 divisors, whose sum is σ = 1297343214. Its totient is φ = 1297343212.

The previous prime is 1297343191. The next prime is 1297343233. The reversal of 1297343213 is 3123437921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1296936169 + 407044 = 36013^2 + 638^2 .

It is an emirp because it is prime and its reverse (3123437921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1297343213 - 2¹⁸ = 1297081069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297343233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648671606 + 648671607.

It is an arithmetic number, because the mean of its divisors is an integer number (648671607).

Almost surely, 2^1297343213 is an apocalyptic number.

It is an amenable number.

1297343213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297343213 is an equidigital number, since it uses as much as digits as its factorization.

1297343213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 35.

The square root of 1297343213 is about 36018.6509047743. The cubic root of 1297343213 is about 1090.6488892264.

The spelling of 1297343213 in words is "one billion, two hundred ninety-seven million, three hundred forty-three thousand, two hundred thirteen".