148540809 has 24 divisors (see below), whose sum is σ = 207973920. Its totient is φ = 94279680.

The previous prime is 148540793. The next prime is 148540837. The reversal of 148540809 is 908045841.

It is not a de Polignac number, because 148540809 - 2⁴ = 148540793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (148540859) 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 23 ways as a sum of consecutive naturals, for example, 192777 + ... + 193545.

It is an arithmetic number, because the mean of its divisors is an integer number (8665580).

Almost surely, 2^148540809 is an apocalyptic number.

It is an amenable number.

148540809 is a deficient number, since it is larger than the sum of its proper divisors (59433111).

148540809 is an equidigital number, since it uses as much as digits as its factorization.

148540809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901 (or 870 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 148540809 is about 12187.7319054859. The cubic root of 148540809 is about 529.6007542686.

The spelling of 148540809 in words is "one hundred forty-eight million, five hundred forty thousand, eight hundred nine".