2108731647 has 16 divisors (see below), whose sum is σ = 3072279168. Its totient is φ = 1275922080.

The previous prime is 2108731627. The next prime is 2108731649. The reversal of 2108731647 is 7461378012.

It is not a de Polignac number, because 2108731647 - 2²⁶ = 2041622783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108731649) 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, 31893 + ... + 72350.

It is an arithmetic number, because the mean of its divisors is an integer number (192017448).

Almost surely, 2^2108731647 is an apocalyptic number.

2108731647 is a deficient number, since it is larger than the sum of its proper divisors (963547521).

2108731647 is a wasteful number, since it uses less digits than its factorization.

2108731647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104870.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 2108731647 is about 45920.9282027269. The cubic root of 2108731647 is about 1282.3515623757.

The spelling of 2108731647 in words is "two billion, one hundred eight million, seven hundred thirty-one thousand, six hundred forty-seven".