148486409 has 4 divisors (see below), whose sum is σ = 153606660. Its totient is φ = 143366160.

The previous prime is 148486369. The next prime is 148486411. The reversal of 148486409 is 904684841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 904684841 = 29 ⋅31196029.

It can be written as a sum of positive squares in 2 ways, for example, as 123765625 + 24720784 = 11125^2 + 4972^2 .

It is a cyclic number.

It is not a de Polignac number, because 148486409 - 2⁸ = 148486153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 148486409.

It is not an unprimeable number, because it can be changed into a prime (148486309) 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, 2560082 + ... + 2560139.

It is an arithmetic number, because the mean of its divisors is an integer number (38401665).

Almost surely, 2^148486409 is an apocalyptic number.

It is an amenable number.

148486409 is a deficient number, since it is larger than the sum of its proper divisors (5120251).

148486409 is an equidigital number, since it uses as much as digits as its factorization.

148486409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5120250.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 148486409 is about 12185.4999487095. The cubic root of 148486409 is about 529.5360945992.

The spelling of 148486409 in words is "one hundred forty-eight million, four hundred eighty-six thousand, four hundred nine".