147839971 has 4 divisors (see below), whose sum is σ = 148049200. Its totient is φ = 147630744.

The previous prime is 147839959. The next prime is 147840013. The reversal of 147839971 is 179938741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179938741 = 563 ⋅319607.

It is a cyclic number.

It is not a de Polignac number, because 147839971 - 2²⁵ = 114285539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147839371) 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, 103551 + ... + 104968.

It is an arithmetic number, because the mean of its divisors is an integer number (37012300).

Almost surely, 2^147839971 is an apocalyptic number.

147839971 is a deficient number, since it is larger than the sum of its proper divisors (209229).

147839971 is an equidigital number, since it uses as much as digits as its factorization.

147839971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209228.

The product of its digits is 381024, while the sum is 49.

The square root of 147839971 is about 12158.9461303190. The cubic root of 147839971 is about 528.7665287398.

The spelling of 147839971 in words is "one hundred forty-seven million, eight hundred thirty-nine thousand, nine hundred seventy-one".