161847 has 18 divisors (see below), whose sum is σ = 272688. Its totient is φ = 92232.

The previous prime is 161839. The next prime is 161869. The reversal of 161847 is 748161.

It is a happy number.

161847 is a `hidden beast` number, since 1 + 618 + 47 = 666.

It is not a de Polignac number, because 161847 - 2³ = 161839 is a prime.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 161847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161807) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 258 + ... + 624.

2¹⁶¹⁸⁴⁷ is an apocalyptic number.

161847 is a deficient number, since it is larger than the sum of its proper divisors (110841).

161847 is a wasteful number, since it uses less digits than its factorization.

161847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 377 counting only the distinct ones).

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

The square root of 161847 is about 402.3021252740. The cubic root of 161847 is about 54.4964506849.

The spelling of 161847 in words is "one hundred sixty-one thousand, eight hundred forty-seven".