148555009 has 4 divisors (see below), whose sum is σ = 148597204. Its totient is φ = 148512816.

The previous prime is 148555003. The next prime is 148555019. The reversal of 148555009 is 900555841.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66471409 + 82083600 = 8153^2 + 9060^2 .

It is a cyclic number.

It is not a de Polignac number, because 148555009 - 2⁷ = 148554881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148555003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15282 + ... + 23035.

It is an arithmetic number, because the mean of its divisors is an integer number (37149301).

Almost surely, 2^148555009 is an apocalyptic number.

It is an amenable number.

148555009 is a deficient number, since it is larger than the sum of its proper divisors (42195).

148555009 is an equidigital number, since it uses as much as digits as its factorization.

148555009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42194.

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 148555009 is about 12188.3144445817. The cubic root of 148555009 is about 529.6176297458.

The spelling of 148555009 in words is "one hundred forty-eight million, five hundred fifty-five thousand, nine".