1143439853 has 2 divisors, whose sum is σ = 1143439854. Its totient is φ = 1143439852.

The previous prime is 1143439837. The next prime is 1143439933. The reversal of 1143439853 is 3589343411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1133466889 + 9972964 = 33667^2 + 3158^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143439853 - 2⁴ = 1143439837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1143439853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143439553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571719926 + 571719927.

It is an arithmetic number, because the mean of its divisors is an integer number (571719927).

Almost surely, 2^1143439853 is an apocalyptic number.

It is an amenable number.

1143439853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143439853 is an equidigital number, since it uses as much as digits as its factorization.

1143439853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 1143439853 is about 33814.7874900908. The cubic root of 1143439853 is about 1045.6935798372.

The spelling of 1143439853 in words is "one billion, one hundred forty-three million, four hundred thirty-nine thousand, eight hundred fifty-three".