1995847 has 4 divisors (see below), whose sum is σ = 2280976. Its totient is φ = 1710720.

The previous prime is 1995841. The next prime is 1995857. The reversal of 1995847 is 7485991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7485991 = 2593 ⋅2887.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1995847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995841) 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, 142554 + ... + 142567.

It is an arithmetic number, because the mean of its divisors is an integer number (570244).

2^1995847 is an apocalyptic number.

1995847 is a deficient number, since it is larger than the sum of its proper divisors (285129).

1995847 is an equidigital number, since it uses as much as digits as its factorization.

1995847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285128.

The product of its digits is 90720, while the sum is 43.

The square root of 1995847 is about 1412.7444921146. The cubic root of 1995847 is about 125.9048370223.

The spelling of 1995847 in words is "one million, nine hundred ninety-five thousand, eight hundred forty-seven".