2117949243 has 16 divisors (see below), whose sum is σ = 2859083040. Its totient is φ = 1394475264.

The previous prime is 2117949217. The next prime is 2117949283. The reversal of 2117949243 is 3429497112.

It is a happy number.

It is not a de Polignac number, because 2117949243 - 2⁶ = 2117949179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2117949195 and 2117949204.

It is not an unprimeable number, because it can be changed into a prime (2117949283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92005 + ... + 112697.

It is an arithmetic number, because the mean of its divisors is an integer number (178692690).

Almost surely, 2^2117949243 is an apocalyptic number.

2117949243 is a deficient number, since it is larger than the sum of its proper divisors (741133797).

2117949243 is a wasteful number, since it uses less digits than its factorization.

2117949243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21118.

The product of its digits is 108864, while the sum is 42.

The square root of 2117949243 is about 46021.1825467360. The cubic root of 2117949243 is about 1284.2172996472.

The spelling of 2117949243 in words is "two billion, one hundred seventeen million, nine hundred forty-nine thousand, two hundred forty-three".