1142643089 has 4 divisors (see below), whose sum is σ = 1305877824. Its totient is φ = 979408356.

The previous prime is 1142643079. The next prime is 1142643091. The reversal of 1142643089 is 9803462411.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9803462411 = 739 ⋅13265849.

It is a cyclic number.

It is not a de Polignac number, because 1142643089 - 2¹² = 1142638993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142643079) 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 in 3 ways as a sum of consecutive naturals, for example, 81617357 + ... + 81617370.

It is an arithmetic number, because the mean of its divisors is an integer number (326469456).

Almost surely, 2^1142643089 is an apocalyptic number.

It is an amenable number.

1142643089 is a deficient number, since it is larger than the sum of its proper divisors (163234735).

1142643089 is an equidigital number, since it uses as much as digits as its factorization.

1142643089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163234734.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 1142643089 is about 33803.0041416440. The cubic root of 1142643089 is about 1045.4506390320.

The spelling of 1142643089 in words is "one billion, one hundred forty-two million, six hundred forty-three thousand, eighty-nine".