1243000069 has 2 divisors, whose sum is σ = 1243000070. Its totient is φ = 1243000068.

The previous prime is 1243000051. The next prime is 1243000081. The reversal of 1243000069 is 9600003421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1231097569 + 11902500 = 35087^2 + 3450^2 .

It is an emirp because it is prime and its reverse (9600003421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1243000069 - 2¹³ = 1242991877 is a prime.

It is a super-2 number, since 2×1243000069² = 3090098343068009522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243000009) 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, 621500034 + 621500035.

It is an arithmetic number, because the mean of its divisors is an integer number (621500035).

Almost surely, 2^1243000069 is an apocalyptic number.

It is an amenable number.

1243000069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243000069 is an equidigital number, since it uses as much as digits as its factorization.

1243000069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1243000069 is about 35256.2061061595. The cubic root of 1243000069 is about 1075.2027939751.

The spelling of 1243000069 in words is "one billion, two hundred forty-three million, sixty-nine", and thus it is an aban number.