148447489 has 4 divisors (see below), whose sum is σ = 148888324. Its totient is φ = 148006656.

The previous prime is 148447483. The next prime is 148447493. The reversal of 148447489 is 984744841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 984744841 = 227 ⋅4338083.

It can be written as a sum of positive squares in 2 ways, for example, as 15737089 + 132710400 = 3967^2 + 11520^2 .

It is a cyclic number.

It is not a de Polignac number, because 148447489 - 2¹¹ = 148445441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148447483) 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, 219912 + ... + 220585.

It is an arithmetic number, because the mean of its divisors is an integer number (37222081).

Almost surely, 2^148447489 is an apocalyptic number.

It is an amenable number.

148447489 is a deficient number, since it is larger than the sum of its proper divisors (440835).

148447489 is an equidigital number, since it uses as much as digits as its factorization.

148447489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440834.

The product of its digits is 1032192, while the sum is 49.

The square root of 148447489 is about 12183.9028640251. The cubic root of 148447489 is about 529.4898247175.

The spelling of 148447489 in words is "one hundred forty-eight million, four hundred forty-seven thousand, four hundred eighty-nine".