842947047 has 8 divisors (see below), whose sum is σ = 1248810480. Its totient is φ = 561964680.

The previous prime is 842946991. The next prime is 842947069. The reversal of 842947047 is 740749248.

It is not a de Polignac number, because 842947047 - 2⁸ = 842946791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 842946993 and 842947011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842947097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15610104 + ... + 15610157.

It is an arithmetic number, because the mean of its divisors is an integer number (156101310).

Almost surely, 2^842947047 is an apocalyptic number.

842947047 is a deficient number, since it is larger than the sum of its proper divisors (405863433).

842947047 is a wasteful number, since it uses less digits than its factorization.

842947047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31220270 (or 31220264 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 842947047 is about 29033.5503684961. The cubic root of 842947047 is about 944.6409419484.

The spelling of 842947047 in words is "eight hundred forty-two million, nine hundred forty-seven thousand, forty-seven".