2147847139 has 2 divisors, whose sum is σ = 2147847140. Its totient is φ = 2147847138.

The previous prime is 2147847137. The next prime is 2147847217. The reversal of 2147847139 is 9317487412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2147847139 - 2¹ = 2147847137 is a prime.

It is a super-2 number, since 2×2147847139² = 9226494665020970642, which contains 22 as substring.

Together with 2147847137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2147847137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073923569 + 1073923570.

It is an arithmetic number, because the mean of its divisors is an integer number (1073923570).

Almost surely, 2^2147847139 is an apocalyptic number.

2147847139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2147847139 is an equidigital number, since it uses as much as digits as its factorization.

2147847139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 46.

The square root of 2147847139 is about 46344.8717659247. The cubic root of 2147847139 is about 1290.2319433508.

The spelling of 2147847139 in words is "two billion, one hundred forty-seven million, eight hundred forty-seven thousand, one hundred thirty-nine".