1143430263 has 40 divisors (see below), whose sum is σ = 1763047440. Its totient is φ = 738046080.

The previous prime is 1143430229. The next prime is 1143430273. The reversal of 1143430263 is 3620343411.

It is not a de Polignac number, because 1143430263 - 2⁸ = 1143430007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143430273) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 460381 + ... + 462857.

It is an arithmetic number, because the mean of its divisors is an integer number (44076186).

Almost surely, 2^1143430263 is an apocalyptic number.

1143430263 is a deficient number, since it is larger than the sum of its proper divisors (619617177).

1143430263 is a wasteful number, since it uses less digits than its factorization.

1143430263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669 (or 2660 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 1143430263 is about 33814.6456879264. The cubic root of 1143430263 is about 1045.6906564275.

Adding to 1143430263 its reverse (3620343411), we get a palindrome (4763773674).

The spelling of 1143430263 in words is "one billion, one hundred forty-three million, four hundred thirty thousand, two hundred sixty-three".