147091 has 4 divisors (see below), whose sum is σ = 168112. Its totient is φ = 126072.

The previous prime is 147089. The next prime is 147097. The reversal of 147091 is 190741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190741 = 19 ⋅10039.

It is a cyclic number.

It is not a de Polignac number, because 147091 - 2¹ = 147089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (147097) 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, 10500 + ... + 10513.

It is an arithmetic number, because the mean of its divisors is an integer number (42028).

2¹⁴⁷⁰⁹¹ is an apocalyptic number.

147091 is a deficient number, since it is larger than the sum of its proper divisors (21021).

147091 is an equidigital number, since it uses as much as digits as its factorization.

147091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21020.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 147091 is about 383.5244451140. The cubic root of 147091 is about 52.7872089845.

The spelling of 147091 in words is "one hundred forty-seven thousand, ninety-one".