8161047 has 8 divisors (see below), whose sum is σ = 12090480. Its totient is φ = 5440680.

The previous prime is 8161039. The next prime is 8161063. The reversal of 8161047 is 7401618.

It is a happy number.

8161047 is a `hidden beast` number, since 8 + 1 + 610 + 47 = 666.

It is not a de Polignac number, because 8161047 - 2³ = 8161039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 302261 = 8161047 / (8 + 1 + 6 + 1 + 0 + 4 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 8161047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8162047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151104 + ... + 151157.

It is an arithmetic number, because the mean of its divisors is an integer number (1511310).

Almost surely, 2^8161047 is an apocalyptic number.

8161047 is a deficient number, since it is larger than the sum of its proper divisors (3929433).

8161047 is a wasteful number, since it uses less digits than its factorization.

8161047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302270 (or 302264 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 8161047 is about 2856.7546271950. The cubic root of 8161047 is about 201.3331521155. Note that the first 3 decimals are identical.

The spelling of 8161047 in words is "eight million, one hundred sixty-one thousand, forty-seven".