1213533397 has 2 divisors, whose sum is σ = 1213533398. Its totient is φ = 1213533396.

The previous prime is 1213533367. The next prime is 1213533427. The reversal of 1213533397 is 7933353121.

It is a balanced prime because it is at equal distance from previous prime (1213533367) and next prime (1213533427).

It can be written as a sum of positive squares in only one way, i.e., 610781796 + 602751601 = 24714^2 + 24551^2 .

It is an emirp because it is prime and its reverse (7933353121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213533397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213533317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606766698 + 606766699.

It is an arithmetic number, because the mean of its divisors is an integer number (606766699).

Almost surely, 2^1213533397 is an apocalyptic number.

It is an amenable number.

1213533397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213533397 is an equidigital number, since it uses as much as digits as its factorization.

1213533397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 37.

The square root of 1213533397 is about 34835.8062487435. The cubic root of 1213533397 is about 1066.6384727682.

It can be divided in two parts, 121353 and 3397, that added together give a triangular number (124750 = T₄₉₉).

The spelling of 1213533397 in words is "one billion, two hundred thirteen million, five hundred thirty-three thousand, three hundred ninety-seven".