1143665549 has 8 divisors (see below), whose sum is σ = 1246480032. Its totient is φ = 1042971120.

The previous prime is 1143665513. The next prime is 1143665557. The reversal of 1143665549 is 9455663411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1143665549 - 2²⁸ = 875230093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143665749) 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, 528887 + ... + 531044.

It is an arithmetic number, because the mean of its divisors is an integer number (155810004).

Almost surely, 2^1143665549 is an apocalyptic number.

It is an amenable number.

1143665549 is a deficient number, since it is larger than the sum of its proper divisors (102814483).

1143665549 is a wasteful number, since it uses less digits than its factorization.

1143665549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060027.

The product of its digits is 388800, while the sum is 44.

The square root of 1143665549 is about 33818.1245636123. The cubic root of 1143665549 is about 1045.7623761484.

It can be divided in two parts, 114 and 3665549, that added together give a palindrome (3665663).

The spelling of 1143665549 in words is "one billion, one hundred forty-three million, six hundred sixty-five thousand, five hundred forty-nine".