1213296397 has 2 divisors, whose sum is σ = 1213296398. Its totient is φ = 1213296396.

The previous prime is 1213296379. The next prime is 1213296439. The reversal of 1213296397 is 7936923121.

Together with previous prime (1213296379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 759222916 + 454073481 = 27554^2 + 21309^2 .

It is an emirp because it is prime and its reverse (7936923121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213296397 - 2²³ = 1204907789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213296317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606648198 + 606648199.

It is an arithmetic number, because the mean of its divisors is an integer number (606648199).

Almost surely, 2^1213296397 is an apocalyptic number.

It is an amenable number.

1213296397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213296397 is an equidigital number, since it uses as much as digits as its factorization.

1213296397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 43.

The square root of 1213296397 is about 34832.4044102614. The cubic root of 1213296397 is about 1066.5690309830.

The spelling of 1213296397 in words is "one billion, two hundred thirteen million, two hundred ninety-six thousand, three hundred ninety-seven".