2143239929 has 8 divisors (see below), whose sum is σ = 2292709608. Its totient is φ = 1996369920.

The previous prime is 2143239899. The next prime is 2143239937. The reversal of 2143239929 is 9299323412.

It can be written as a sum of positive squares in 4 ways, for example, as 1310802025 + 832437904 = 36205^2 + 28852^2 .

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 2143239929 - 2⁸ = 2143239673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2143239929.

It is not an unprimeable number, because it can be changed into a prime (2143239949) 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, 648212 + ... + 651509.

It is an arithmetic number, because the mean of its divisors is an integer number (286588701).

Almost surely, 2^2143239929 is an apocalyptic number.

It is an amenable number.

2143239929 is a deficient number, since it is larger than the sum of its proper divisors (149469679).

2143239929 is a wasteful number, since it uses less digits than its factorization.

2143239929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299835.

The product of its digits is 209952, while the sum is 44.

The square root of 2143239929 is about 46295.1393668925. The cubic root of 2143239929 is about 1289.3087515072.

The spelling of 2143239929 in words is "two billion, one hundred forty-three million, two hundred thirty-nine thousand, nine hundred twenty-nine".