147439 has 4 divisors (see below), whose sum is σ = 150624. Its totient is φ = 144256.

The previous prime is 147419. The next prime is 147449. The reversal of 147439 is 934741.

147439 = T₂ + T₃ + ... + T₉₅.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934741 = 881 ⋅1061.

It is a cyclic number.

It is not a de Polignac number, because 147439 - 2⁷ = 147311 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 (147409) 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, 1522 + ... + 1615.

It is an arithmetic number, because the mean of its divisors is an integer number (37656).

147439 is a Friedman number, since it can be written as 9*4^7-13-4, using all its digits and the basic arithmetic operations.

2¹⁴⁷⁴³⁹ is an apocalyptic number.

147439 is a deficient number, since it is larger than the sum of its proper divisors (3185).

147439 is an equidigital number, since it uses as much as digits as its factorization.

147439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184.

The product of its digits is 3024, while the sum is 28.

The square root of 147439 is about 383.9778639453. The cubic root of 147439 is about 52.8288056394.

The spelling of 147439 in words is "one hundred forty-seven thousand, four hundred thirty-nine".