1213169443 has 2 divisors, whose sum is σ = 1213169444. Its totient is φ = 1213169442.

The previous prime is 1213169423. The next prime is 1213169467. The reversal of 1213169443 is 3449613121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213169443 - 2¹³ = 1213161251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213169399 and 1213169408.

It is not a weakly prime, because it can be changed into another prime (1213169423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606584721 + 606584722.

It is an arithmetic number, because the mean of its divisors is an integer number (606584722).

Almost surely, 2^1213169443 is an apocalyptic number.

1213169443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213169443 is an equidigital number, since it uses as much as digits as its factorization.

1213169443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 1213169443 is about 34830.5820077701. The cubic root of 1213169443 is about 1066.5318293209.

The spelling of 1213169443 in words is "one billion, two hundred thirteen million, one hundred sixty-nine thousand, four hundred forty-three".