1143654643 has 16 divisors (see below), whose sum is σ = 1208390400. Its totient is φ = 1080772000.

The previous prime is 1143654641. The next prime is 1143654649. The reversal of 1143654643 is 3464563411.

It is not a de Polignac number, because 1143654643 - 2¹ = 1143654641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143654641) 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, 428130 + ... + 430792.

It is an arithmetic number, because the mean of its divisors is an integer number (75524400).

Almost surely, 2^1143654643 is an apocalyptic number.

1143654643 is a deficient number, since it is larger than the sum of its proper divisors (64735757).

1143654643 is a wasteful number, since it uses less digits than its factorization.

1143654643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002.

The product of its digits is 103680, while the sum is 37.

The square root of 1143654643 is about 33817.9633183313. The cubic root of 1143654643 is about 1045.7590520062.

The spelling of 1143654643 in words is "one billion, one hundred forty-three million, six hundred fifty-four thousand, six hundred forty-three".