148541809 has 4 divisors (see below), whose sum is σ = 159968116. Its totient is φ = 137115504.

The previous prime is 148541807. The next prime is 148541819. The reversal of 148541809 is 908145841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 908145841 = 131 ⋅6932411.

It can be written as a sum of positive squares in 2 ways, for example, as 14630625 + 133911184 = 3825^2 + 11572^2 .

It is a cyclic number.

It is not a de Polignac number, because 148541809 - 2¹ = 148541807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148541803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5713134 + ... + 5713159.

It is an arithmetic number, because the mean of its divisors is an integer number (39992029).

Almost surely, 2^148541809 is an apocalyptic number.

It is an amenable number.

148541809 is a deficient number, since it is larger than the sum of its proper divisors (11426307).

148541809 is a wasteful number, since it uses less digits than its factorization.

148541809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11426306.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 148541809 is about 12187.7729302773. The cubic root of 148541809 is about 529.6019427177.

The spelling of 148541809 in words is "one hundred forty-eight million, five hundred forty-one thousand, eight hundred nine".