147891 has 4 divisors (see below), whose sum is σ = 197192. Its totient is φ = 98592.

The previous prime is 147881. The next prime is 147919. The reversal of 147891 is 198741.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 147891 - 2⁵ = 147859 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 147891.

It is not an unprimeable number, because it can be changed into a prime (147811) 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, 24646 + ... + 24651.

It is an arithmetic number, because the mean of its divisors is an integer number (49298).

2¹⁴⁷⁸⁹¹ is an apocalyptic number.

147891 is a deficient number, since it is larger than the sum of its proper divisors (49301).

147891 is an equidigital number, since it uses as much as digits as its factorization.

147891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49300.

The product of its digits is 2016, while the sum is 30.

The square root of 147891 is about 384.5659891358. The cubic root of 147891 is about 52.8827358756.

The spelling of 147891 in words is "one hundred forty-seven thousand, eight hundred ninety-one".