148909 has 4 divisors (see below), whose sum is σ = 152416. Its totient is φ = 145404.

The previous prime is 148891. The next prime is 148913. The reversal of 148909 is 909841.

148909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 909841 = 431 ⋅2111.

It is a cyclic number.

It is not a de Polignac number, because 148909 - 2⁷ = 148781 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148949) 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, 1689 + ... + 1774.

It is an arithmetic number, because the mean of its divisors is an integer number (38104).

2¹⁴⁸⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

148909 is a deficient number, since it is larger than the sum of its proper divisors (3507).

148909 is an equidigital number, since it uses as much as digits as its factorization.

148909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 148909 is about 385.8872892439. The cubic root of 148909 is about 53.0037970461.

The spelling of 148909 in words is "one hundred forty-eight thousand, nine hundred nine".