1212417397 has 2 divisors, whose sum is σ = 1212417398. Its totient is φ = 1212417396.

The previous prime is 1212417383. The next prime is 1212417419. The reversal of 1212417397 is 7937142121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1096338321 + 116079076 = 33111^2 + 10774^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212417397 - 2¹⁵ = 1212384629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212417317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606208698 + 606208699.

It is an arithmetic number, because the mean of its divisors is an integer number (606208699).

Almost surely, 2^1212417397 is an apocalyptic number.

It is an amenable number.

1212417397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212417397 is an equidigital number, since it uses as much as digits as its factorization.

1212417397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 37.

The square root of 1212417397 is about 34819.7845628028. The cubic root of 1212417397 is about 1066.3114020770.

It can be divided in two parts, 1212 and 417397, that added together give a square (418609 = 647²).

The spelling of 1212417397 in words is "one billion, two hundred twelve million, four hundred seventeen thousand, three hundred ninety-seven".