340005605 has 4 divisors (see below), whose sum is σ = 408006732. Its totient is φ = 272004480.

The previous prime is 340005583. The next prime is 340005607. The reversal of 340005605 is 506500043.

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 153710404 + 186295201 = 12398^2 + 13649^2 .

It is not a de Polignac number, because 340005605 - 2⁸ = 340005349 is a prime.

It is a super-2 number, since 2×340005605² = 231207622862832050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340005607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34000556 + ... + 34000565.

It is an arithmetic number, because the mean of its divisors is an integer number (102001683).

Almost surely, 2^340005605 is an apocalyptic number.

It is an amenable number.

340005605 is a deficient number, since it is larger than the sum of its proper divisors (68001127).

340005605 is an equidigital number, since it uses as much as digits as its factorization.

340005605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68001126.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 340005605 is about 18439.2409008614. The cubic root of 340005605 is about 697.9570399911.

Adding to 340005605 its reverse (506500043), we get a palindrome (846505648).

The spelling of 340005605 in words is "three hundred forty million, five thousand, six hundred five".