345204005 has 4 divisors (see below), whose sum is σ = 414244812. Its totient is φ = 276163200.

The previous prime is 345203993. The next prime is 345204007. The reversal of 345204005 is 500402543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500402543 = 3803 ⋅131581.

It can be written as a sum of positive squares in 2 ways, for example, as 60202081 + 285001924 = 7759^2 + 16882^2 .

It is a de Polignac number, because none of the positive numbers 2^k-345204005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345204007) 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, 34520396 + ... + 34520405.

It is an arithmetic number, because the mean of its divisors is an integer number (103561203).

Almost surely, 2^345204005 is an apocalyptic number.

It is an amenable number.

345204005 is a deficient number, since it is larger than the sum of its proper divisors (69040807).

345204005 is an equidigital number, since it uses as much as digits as its factorization.

345204005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69040806.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 345204005 is about 18579.6664394170. Note that the first 3 decimals coincide. The cubic root of 345204005 is about 701.4961231589.

Adding to 345204005 its reverse (500402543), we get a palindrome (845606548).

The spelling of 345204005 in words is "three hundred forty-five million, two hundred four thousand, five".