148952809 has 4 divisors (see below), whose sum is σ = 148977220. Its totient is φ = 148928400.

The previous prime is 148952801. The next prime is 148952833. The reversal of 148952809 is 908259841.

148952809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 908259841 = 317 ⋅2865173.

It can be written as a sum of positive squares in 2 ways, for example, as 115347600 + 33605209 = 10740^2 + 5797^2 .

It is a cyclic number.

It is not a de Polignac number, because 148952809 - 2³ = 148952801 is a prime.

It is a super-3 number, since 3×148952809³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148952801) 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, 5959 + ... + 18259.

It is an arithmetic number, because the mean of its divisors is an integer number (37244305).

Almost surely, 2^148952809 is an apocalyptic number.

It is an amenable number.

148952809 is a deficient number, since it is larger than the sum of its proper divisors (24411).

148952809 is a wasteful number, since it uses less digits than its factorization.

148952809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24410.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 148952809 is about 12204.6224439759. The cubic root of 148952809 is about 530.0899443885.

The spelling of 148952809 in words is "one hundred forty-eight million, nine hundred fifty-two thousand, eight hundred nine".