2139207847 has 6 divisors (see below), whose sum is σ = 2488466328. Its totient is φ = 1833606684.

The previous prime is 2139207809. The next prime is 2139207857. The reversal of 2139207847 is 7487029312.

It is a de Polignac number, because none of the positive numbers 2^k-2139207847 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 (2139207857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21828603 + ... + 21828700.

It is an arithmetic number, because the mean of its divisors is an integer number (414744388).

Almost surely, 2^2139207847 is an apocalyptic number.

2139207847 is a deficient number, since it is larger than the sum of its proper divisors (349258481).

2139207847 is an equidigital number, since it uses as much as digits as its factorization.

2139207847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43657317 (or 43657310 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 2139207847 is about 46251.5712922275. The cubic root of 2139207847 is about 1288.4997174842.

The spelling of 2139207847 in words is "two billion, one hundred thirty-nine million, two hundred seven thousand, eight hundred forty-seven".