1243344169 has 2 divisors, whose sum is σ = 1243344170. Its totient is φ = 1243344168.

The previous prime is 1243344163. The next prime is 1243344227. The reversal of 1243344169 is 9614433421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1239392025 + 3952144 = 35205^2 + 1988^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243344169 - 2³ = 1243344161 is a prime.

It is a super-2 number, since 2×1243344169² = 3091809445172601122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1243344161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621672084 + 621672085.

It is an arithmetic number, because the mean of its divisors is an integer number (621672085).

Almost surely, 2^1243344169 is an apocalyptic number.

It is an amenable number.

1243344169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243344169 is an equidigital number, since it uses as much as digits as its factorization.

1243344169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 37.

The square root of 1243344169 is about 35261.0857603676. The cubic root of 1243344169 is about 1075.3020010348.

The spelling of 1243344169 in words is "one billion, two hundred forty-three million, three hundred forty-four thousand, one hundred sixty-nine".