148546409 has 4 divisors (see below), whose sum is σ = 162050640. Its totient is φ = 135042180.

The previous prime is 148546393. The next prime is 148546421. The reversal of 148546409 is 904645841.

148546409 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 148546409 - 2⁴ = 148546393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148546469) 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, 6752099 + ... + 6752120.

It is an arithmetic number, because the mean of its divisors is an integer number (40512660).

Almost surely, 2^148546409 is an apocalyptic number.

It is an amenable number.

148546409 is a deficient number, since it is larger than the sum of its proper divisors (13504231).

148546409 is a wasteful number, since it uses less digits than its factorization.

148546409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13504230.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 148546409 is about 12187.9616425389. The cubic root of 148546409 is about 529.6074095148.

The spelling of 148546409 in words is "one hundred forty-eight million, five hundred forty-six thousand, four hundred nine".