2117147789 has 8 divisors (see below), whose sum is σ = 2229024000. Its totient is φ = 2005316352.

The previous prime is 2117147779. The next prime is 2117147833. The reversal of 2117147789 is 9877417112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2117147789 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 (2117147729) 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, 134852 + ... + 149730.

It is an arithmetic number, because the mean of its divisors is an integer number (278628000).

Almost surely, 2^2117147789 is an apocalyptic number.

It is an amenable number.

2117147789 is a deficient number, since it is larger than the sum of its proper divisors (111876211).

2117147789 is a wasteful number, since it uses less digits than its factorization.

2117147789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22387.

The product of its digits is 197568, while the sum is 47.

The square root of 2117147789 is about 46012.4742760048. The cubic root of 2117147789 is about 1284.0552921538.

The spelling of 2117147789 in words is "two billion, one hundred seventeen million, one hundred forty-seven thousand, seven hundred eighty-nine".