148443309 has 24 divisors (see below), whose sum is σ = 245735360. Its totient is φ = 84587328.

The previous prime is 148443307. The next prime is 148443331. The reversal of 148443309 is 903344841.

It is not a de Polignac number, because 148443309 - 2¹ = 148443307 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148443307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20769 + ... + 26985.

Almost surely, 2^148443309 is an apocalyptic number.

It is an amenable number.

148443309 is a deficient number, since it is larger than the sum of its proper divisors (97292051).

148443309 is a wasteful number, since it uses less digits than its factorization.

148443309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6609 (or 6606 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 148443309 is about 12183.7313250088. The cubic root of 148443309 is about 529.4848548608.

The spelling of 148443309 in words is "one hundred forty-eight million, four hundred forty-three thousand, three hundred nine".