1143988061 has 4 divisors (see below), whose sum is σ = 1144717824. Its totient is φ = 1143258300.

The previous prime is 1143988033. The next prime is 1143988091. The reversal of 1143988061 is 1608893411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1143988061 - 2¹⁰ = 1143987037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143988031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362525 + ... + 365666.

It is an arithmetic number, because the mean of its divisors is an integer number (286179456).

Almost surely, 2^1143988061 is an apocalyptic number.

It is an amenable number.

1143988061 is a deficient number, since it is larger than the sum of its proper divisors (729763).

1143988061 is an equidigital number, since it uses as much as digits as its factorization.

1143988061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729762.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 1143988061 is about 33822.8925581477. The cubic root of 1143988061 is about 1045.8606680594.

The spelling of 1143988061 in words is "one billion, one hundred forty-three million, nine hundred eighty-eight thousand, sixty-one".