147849139 has 4 divisors (see below), whose sum is σ = 147940024. Its totient is φ = 147758256.

The previous prime is 147849131. The next prime is 147849173. The reversal of 147849139 is 931948741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931948741 = 997 ⋅934753.

It is a cyclic number.

It is not a de Polignac number, because 147849139 - 2³ = 147849131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147849131) 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, 42957 + ... + 46270.

It is an arithmetic number, because the mean of its divisors is an integer number (36985006).

Almost surely, 2^147849139 is an apocalyptic number.

147849139 is a deficient number, since it is larger than the sum of its proper divisors (90885).

147849139 is an equidigital number, since it uses as much as digits as its factorization.

147849139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90884.

The product of its digits is 217728, while the sum is 46.

The square root of 147849139 is about 12159.3231308326. The cubic root of 147849139 is about 528.7774586466. Note that the first 3 decimals are identical.

The spelling of 147849139 in words is "one hundred forty-seven million, eight hundred forty-nine thousand, one hundred thirty-nine".