148309 has 4 divisors (see below), whose sum is σ = 169504. Its totient is φ = 127116.

The previous prime is 148303. The next prime is 148331. The reversal of 148309 is 903841.

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 a cyclic number.

It is not a de Polignac number, because 148309 - 2³ = 148301 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 (148301) 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, 10587 + ... + 10600.

It is an arithmetic number, because the mean of its divisors is an integer number (42376).

2¹⁴⁸³⁰⁹ is an apocalyptic number.

It is an amenable number.

148309 is a deficient number, since it is larger than the sum of its proper divisors (21195).

148309 is an equidigital number, since it uses as much as digits as its factorization.

148309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21194.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 148309 is about 385.1090754578. The cubic root of 148309 is about 52.9325117022.

The spelling of 148309 in words is "one hundred forty-eight thousand, three hundred nine".