1143005509 has 8 divisors (see below), whose sum is σ = 1153860120. Its totient is φ = 1132164096.

The previous prime is 1143005491. The next prime is 1143005561. The reversal of 1143005509 is 9055003411.

It can be written as a sum of positive squares in 4 ways, for example, as 5832225 + 1137173284 = 2415^2 + 33722^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1143005509 - 2¹⁷ = 1142874437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143005569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292879 + ... + 296755.

It is an arithmetic number, because the mean of its divisors is an integer number (144232515).

Almost surely, 2^1143005509 is an apocalyptic number.

It is an amenable number.

1143005509 is a deficient number, since it is larger than the sum of its proper divisors (10854611).

1143005509 is a wasteful number, since it uses less digits than its factorization.

1143005509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6599.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 1143005509 is about 33808.3644827726. The cubic root of 1143005509 is about 1045.5611582812.

The spelling of 1143005509 in words is "one billion, one hundred forty-three million, five thousand, five hundred nine".