148809 has 4 divisors (see below), whose sum is σ = 198416. Its totient is φ = 99204.

The previous prime is 148793. The next prime is 148817. The reversal of 148809 is 908841.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 148809 - 2⁴ = 148793 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148829) 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 3 ways as a sum of consecutive naturals, for example, 24799 + ... + 24804.

It is an arithmetic number, because the mean of its divisors is an integer number (49604).

2¹⁴⁸⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

148809 is a deficient number, since it is larger than the sum of its proper divisors (49607).

148809 is an equidigital number, since it uses as much as digits as its factorization.

148809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49606.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 148809 is about 385.7576959699. The cubic root of 148809 is about 52.9919294701.

The spelling of 148809 in words is "one hundred forty-eight thousand, eight hundred nine".