345306505 has 4 divisors (see below), whose sum is σ = 414367812. Its totient is φ = 276245200.

The previous prime is 345306497. The next prime is 345306553. The reversal of 345306505 is 505603543.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 162001984 + 183304521 = 12728^2 + 13539^2 .

It is not a de Polignac number, because 345306505 - 2³ = 345306497 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34530646 + ... + 34530655.

It is an arithmetic number, because the mean of its divisors is an integer number (103591953).

Almost surely, 2^345306505 is an apocalyptic number.

It is an amenable number.

345306505 is a deficient number, since it is larger than the sum of its proper divisors (69061307).

345306505 is an equidigital number, since it uses as much as digits as its factorization.

345306505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69061306.

The product of its (nonzero) digits is 27000, while the sum is 31.

The square root of 345306505 is about 18582.4246265120. The cubic root of 345306505 is about 701.5655470707.

The spelling of 345306505 in words is "three hundred forty-five million, three hundred six thousand, five hundred five".