148953209 has 8 divisors (see below), whose sum is σ = 149837448. Its totient is φ = 148072320.

The previous prime is 148953191. The next prime is 148953223. The reversal of 148953209 is 902359841.

It can be written as a sum of positive squares in 4 ways, for example, as 42863209 + 106090000 = 6547^2 + 10300^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 148953209 - 2⁸ = 148952953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148953809) 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 7 ways as a sum of consecutive naturals, for example, 181019 + ... + 181839.

It is an arithmetic number, because the mean of its divisors is an integer number (18729681).

Almost surely, 2^148953209 is an apocalyptic number.

It is an amenable number.

148953209 is a deficient number, since it is larger than the sum of its proper divisors (884239).

148953209 is an equidigital number, since it uses as much as digits as its factorization.

148953209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 148953209 is about 12204.6388311986. The cubic root of 148953209 is about 530.0904188918.

The spelling of 148953209 in words is "one hundred forty-eight million, nine hundred fifty-three thousand, two hundred nine".