1143401643 has 16 divisors (see below), whose sum is σ = 1694570400. Its totient is φ = 761978880.

The previous prime is 1143401617. The next prime is 1143401653. The reversal of 1143401643 is 3461043411.

1143401643 is a `hidden beast` number, since 1 + 14 + 3 + 4 + 0 + 1 + 643 = 666.

It is not a de Polignac number, because 1143401643 - 2⁶ = 1143401579 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1143401653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83523 + ... + 96243.

It is an arithmetic number, because the mean of its divisors is an integer number (105910650).

Almost surely, 2^1143401643 is an apocalyptic number.

1143401643 is a deficient number, since it is larger than the sum of its proper divisors (551168757).

1143401643 is a wasteful number, since it uses less digits than its factorization.

1143401643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16059 (or 16053 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1143401643 is about 33814.2224958670. Note that the first 3 decimals coincide. The cubic root of 1143401643 is about 1045.6819318272.

The spelling of 1143401643 in words is "one billion, one hundred forty-three million, four hundred one thousand, six hundred forty-three".