148558409 has 4 divisors (see below), whose sum is σ = 148745604. Its totient is φ = 148371216.

The previous prime is 148558381. The next prime is 148558439. The reversal of 148558409 is 904855841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 904855841 = 157 ⋅5763413.

It can be written as a sum of positive squares in 2 ways, for example, as 48958009 + 99600400 = 6997^2 + 9980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148558409 is a prime.

It is a super-2 number, since 2×148558409² = 44139201769222562, which contains 22 as substring.

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 148558409.

It is not an unprimeable number, because it can be changed into a prime (148558439) 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, 92402 + ... + 93995.

It is an arithmetic number, because the mean of its divisors is an integer number (37186401).

Almost surely, 2^148558409 is an apocalyptic number.

It is an amenable number.

148558409 is a deficient number, since it is larger than the sum of its proper divisors (187195).

148558409 is an equidigital number, since it uses as much as digits as its factorization.

148558409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187194.

The product of its (nonzero) digits is 230400, while the sum is 44.

The square root of 148558409 is about 12188.4539216424. The cubic root of 148558409 is about 529.6216701934.

The spelling of 148558409 in words is "one hundred forty-eight million, five hundred fifty-eight thousand, four hundred nine".