2147347847 has 4 divisors (see below), whose sum is σ = 2149324416. Its totient is φ = 2145371280.

The previous prime is 2147347831. The next prime is 2147347861. The reversal of 2147347847 is 7487437412.

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 2147347847 - 2⁴ = 2147347831 is a prime.

It is a super-2 number, since 2×2147347847² = 9222205552031070818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147347547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 986654 + ... + 988827.

It is an arithmetic number, because the mean of its divisors is an integer number (537331104).

Almost surely, 2^2147347847 is an apocalyptic number.

2147347847 is a deficient number, since it is larger than the sum of its proper divisors (1976569).

2147347847 is a wasteful number, since it uses less digits than its factorization.

2147347847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976568.

The product of its digits is 1053696, while the sum is 47.

The square root of 2147347847 is about 46339.4847511277. The cubic root of 2147347847 is about 1290.1319591388.

The spelling of 2147347847 in words is "two billion, one hundred forty-seven million, three hundred forty-seven thousand, eight hundred forty-seven".