2179983647 has 4 divisors (see below), whose sum is σ = 2182301256. Its totient is φ = 2177666040.

The previous prime is 2179983587. The next prime is 2179983671. The reversal of 2179983647 is 7463899712.

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

It is a cyclic number.

It is not a de Polignac number, because 2179983647 - 2⁸ = 2179983391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2179983592 and 2179983601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2179983947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157393 + ... + 1159274.

It is an arithmetic number, because the mean of its divisors is an integer number (545575314).

Almost surely, 2^2179983647 is an apocalyptic number.

2179983647 is a deficient number, since it is larger than the sum of its proper divisors (2317609).

2179983647 is an equidigital number, since it uses as much as digits as its factorization.

2179983647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317608.

The product of its digits is 4572288, while the sum is 56.

The square root of 2179983647 is about 46690.2949979972. The cubic root of 2179983647 is about 1296.6350147756.

The spelling of 2179983647 in words is "two billion, one hundred seventy-nine million, nine hundred eighty-three thousand, six hundred forty-seven".