2143449709 has 12 divisors (see below), whose sum is σ = 2350411648. Its totient is φ = 1952280000.

The previous prime is 2143449697. The next prime is 2143449713. The reversal of 2143449709 is 9079443412.

It is not a de Polignac number, because 2143449709 - 2⁵ = 2143449677 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 (2143449779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110667 + ... + 128584.

Almost surely, 2^2143449709 is an apocalyptic number.

It is an amenable number.

2143449709 is a deficient number, since it is larger than the sum of its proper divisors (206961939).

2143449709 is a wasteful number, since it uses less digits than its factorization.

2143449709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239316 (or 239299 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 2143449709 is about 46297.4049920727. The cubic root of 2143449709 is about 1289.3508159167.

The spelling of 2143449709 in words is "two billion, one hundred forty-three million, four hundred forty-nine thousand, seven hundred nine".