345258809 has 4 divisors (see below), whose sum is σ = 394581504. Its totient is φ = 295936116.

The previous prime is 345258791. The next prime is 345258817. The reversal of 345258809 is 908852543.

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: 908852543 = 107 ⋅8493949.

It is not a de Polignac number, because 345258809 - 2²⁰ = 344210233 is a prime.

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 345258809.

It is not an unprimeable number, because it can be changed into a prime (345258869) 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, 24661337 + ... + 24661350.

It is an arithmetic number, because the mean of its divisors is an integer number (98645376).

Almost surely, 2^345258809 is an apocalyptic number.

It is an amenable number.

345258809 is a deficient number, since it is larger than the sum of its proper divisors (49322695).

345258809 is an equidigital number, since it uses as much as digits as its factorization.

345258809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49322694.

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 345258809 is about 18581.1412189887. The cubic root of 345258809 is about 701.5332439712.

It can be divided in two parts, 34525 and 8809, that added together give a palindrome (43334).

The spelling of 345258809 in words is "three hundred forty-five million, two hundred fifty-eight thousand, eight hundred nine".