147909 has 8 divisors (see below), whose sum is σ = 201600. Its totient is φ = 96416.

The previous prime is 147881. The next prime is 147919. The reversal of 147909 is 909741.

147909 = 82² + 83² + ... + 99².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 147909 - 2⁹ = 147397 is a prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 147909.

It is not an unprimeable number, because it can be changed into a prime (147919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384 + ... + 665.

It is an arithmetic number, because the mean of its divisors is an integer number (25200).

2¹⁴⁷⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

147909 is a deficient number, since it is larger than the sum of its proper divisors (53691).

147909 is a wasteful number, since it uses less digits than its factorization.

147909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 147909 is about 384.5893914294. The cubic root of 147909 is about 52.8848812633.

The spelling of 147909 in words is "one hundred forty-seven thousand, nine hundred nine".