345920005 has 4 divisors (see below), whose sum is σ = 415104012. Its totient is φ = 276736000.

The previous prime is 345919999. The next prime is 345920017. The reversal of 345920005 is 500029543.

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 103245921 + 242674084 = 10161^2 + 15578^2 .

It is not a de Polignac number, because 345920005 - 2³ = 345919997 is a prime.

It is a Duffinian number.

It is a congruent 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, 34591996 + ... + 34592005.

It is an arithmetic number, because the mean of its divisors is an integer number (103776003).

Almost surely, 2^345920005 is an apocalyptic number.

It is an amenable number.

345920005 is a deficient number, since it is larger than the sum of its proper divisors (69184007).

345920005 is an equidigital number, since it uses as much as digits as its factorization.

345920005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69184006.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 345920005 is about 18598.9248345166. The cubic root of 345920005 is about 701.9807876442.

Adding to 345920005 its reverse (500029543), we get a palindrome (845949548).

The spelling of 345920005 in words is "three hundred forty-five million, nine hundred twenty thousand, five".