148790809 has 4 divisors (see below), whose sum is σ = 148818640. Its totient is φ = 148762980.

The previous prime is 148790779. The next prime is 148790833. The reversal of 148790809 is 908097841.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 148790809 - 2¹⁷ = 148659737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148790849) 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, 3087 + ... + 17524.

It is an arithmetic number, because the mean of its divisors is an integer number (37204660).

Almost surely, 2^148790809 is an apocalyptic number.

It is an amenable number.

148790809 is a deficient number, since it is larger than the sum of its proper divisors (27831).

148790809 is an equidigital number, since it uses as much as digits as its factorization.

148790809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27830.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 148790809 is about 12197.9838088104. The cubic root of 148790809 is about 529.8977006782.

The spelling of 148790809 in words is "one hundred forty-eight million, seven hundred ninety thousand, eight hundred nine".