1143112309 has 2 divisors, whose sum is σ = 1143112310. Its totient is φ = 1143112308.

The previous prime is 1143112307. The next prime is 1143112331. The reversal of 1143112309 is 9032113411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 779638084 + 363474225 = 27922^2 + 19065^2 .

It is an emirp because it is prime and its reverse (9032113411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1143112309 - 2¹ = 1143112307 is a prime.

It is a super-2 number, since 2×1143112309² = 2613411501974622962, which contains 22 as substring.

Together with 1143112307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143112307) 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, 571556154 + 571556155.

It is an arithmetic number, because the mean of its divisors is an integer number (571556155).

Almost surely, 2^1143112309 is an apocalyptic number.

It is an amenable number.

1143112309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143112309 is an equidigital number, since it uses as much as digits as its factorization.

1143112309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1143112309 is about 33809.9439366586. The cubic root of 1143112309 is about 1045.5937222695.

The spelling of 1143112309 in words is "one billion, one hundred forty-three million, one hundred twelve thousand, three hundred nine".