2113999947 has 12 divisors (see below), whose sum is σ = 3092209120. Its totient is φ = 1391493168.

The previous prime is 2113999939. The next prime is 2113999949. The reversal of 2113999947 is 7499993112.

It is a happy number.

It is not a de Polignac number, because 2113999947 - 2³ = 2113999939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2113999893 and 2113999902.

It is not an unprimeable number, because it can be changed into a prime (2113999949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1485928 + ... + 1487349.

Almost surely, 2^2113999947 is an apocalyptic number.

2113999947 is a deficient number, since it is larger than the sum of its proper divisors (978209173).

2113999947 is a wasteful number, since it uses less digits than its factorization.

2113999947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2973362 (or 2973359 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 2113999947 is about 45978.2551539312. The cubic root of 2113999947 is about 1283.4185852101.

The spelling of 2113999947 in words is "two billion, one hundred thirteen million, nine hundred ninety-nine thousand, nine hundred forty-seven".