348812809 has 4 divisors (see below), whose sum is σ = 350377216. Its totient is φ = 347248404.

The previous prime is 348812797. The next prime is 348812833. The reversal of 348812809 is 908218843.

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 348812809 - 2⁵ = 348812777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (348812879) 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, 781869 + ... + 782314.

It is an arithmetic number, because the mean of its divisors is an integer number (87594304).

Almost surely, 2^348812809 is an apocalyptic number.

It is an amenable number.

348812809 is a deficient number, since it is larger than the sum of its proper divisors (1564407).

348812809 is a wasteful number, since it uses less digits than its factorization.

348812809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564406.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 348812809 is about 18676.5309680358. The cubic root of 348812809 is about 703.9321620508.

The spelling of 348812809 in words is "three hundred forty-eight million, eight hundred twelve thousand, eight hundred nine".