2168929009 has 4 divisors (see below), whose sum is σ = 2335769716. Its totient is φ = 2002088304.

The previous prime is 2168929001. The next prime is 2168929013. The reversal of 2168929009 is 9009298612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1176490000 + 992439009 = 34300^2 + 31503^2 .

It is a cyclic number.

It is not a de Polignac number, because 2168929009 - 2³ = 2168929001 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 2168929009.

It is not an unprimeable number, because it can be changed into a prime (2168929001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83420334 + ... + 83420359.

It is an arithmetic number, because the mean of its divisors is an integer number (583942429).

Almost surely, 2^2168929009 is an apocalyptic number.

It is an amenable number.

2168929009 is a deficient number, since it is larger than the sum of its proper divisors (166840707).

2168929009 is a wasteful number, since it uses less digits than its factorization.

2168929009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166840706.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 2168929009 is about 46571.7619271593. The cubic root of 2168929009 is about 1294.4395658881.

The spelling of 2168929009 in words is "two billion, one hundred sixty-eight million, nine hundred twenty-nine thousand, nine".