148308409 has 4 divisors (see below), whose sum is σ = 148365904. Its totient is φ = 148250916.

The previous prime is 148308403. The next prime is 148308427. The reversal of 148308409 is 904803841.

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, and also an emirpimes, since its reverse is a distinct semiprime: 904803841 = 149 ⋅6072509.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148308409 is a prime.

It is a super-2 number, since 2×148308409² = 43990768360222562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148308403) 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, 24687 + ... + 30100.

It is an arithmetic number, because the mean of its divisors is an integer number (37091476).

Almost surely, 2^148308409 is an apocalyptic number.

It is an amenable number.

148308409 is a deficient number, since it is larger than the sum of its proper divisors (57495).

148308409 is an equidigital number, since it uses as much as digits as its factorization.

148308409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57494.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 148308409 is about 12178.1939958271. The cubic root of 148308409 is about 529.3244139148.

The spelling of 148308409 in words is "one hundred forty-eight million, three hundred eight thousand, four hundred nine".