1143213129 has 8 divisors (see below), whose sum is σ = 1693649120. Its totient is φ = 762142068.

The previous prime is 1143213121. The next prime is 1143213131. The reversal of 1143213129 is 9213123411.

It is not a de Polignac number, because 1143213129 - 2³ = 1143213121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 42341227 = 1143213129 / (1 + 1 + 4 + 3 + 2 + 1 + 3 + 1 + 2 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143213121) 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, 21170587 + ... + 21170640.

It is an arithmetic number, because the mean of its divisors is an integer number (211706140).

Almost surely, 2^1143213129 is an apocalyptic number.

It is an amenable number.

1143213129 is a deficient number, since it is larger than the sum of its proper divisors (550435991).

1143213129 is an equidigital number, since it uses as much as digits as its factorization.

1143213129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42341236 (or 42341230 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1143213129 is about 33811.4348852574. The cubic root of 1143213129 is about 1045.6244610573.

The spelling of 1143213129 in words is "one billion, one hundred forty-three million, two hundred thirteen thousand, one hundred twenty-nine".