3420111605 has 4 divisors (see below), whose sum is σ = 4104133932. Its totient is φ = 2736089280.

The previous prime is 3420111577. The next prime is 3420111631. The reversal of 3420111605 is 5061110243.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5061110243 = 7 ⋅723015749.

It can be written as a sum of positive squares in 2 ways, for example, as 1110155761 + 2309955844 = 33319^2 + 48062^2 .

It is not a de Polignac number, because 3420111605 - 2²² = 3415917301 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342011156 + ... + 342011165.

It is an arithmetic number, because the mean of its divisors is an integer number (1026033483).

Almost surely, 2^3420111605 is an apocalyptic number.

It is an amenable number.

3420111605 is a deficient number, since it is larger than the sum of its proper divisors (684022327).

3420111605 is an equidigital number, since it uses as much as digits as its factorization.

3420111605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684022326.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 3420111605 is about 58481.7202636858. The cubic root of 3420111605 is about 1506.6536431239.

Adding to 3420111605 its reverse (5061110243), we get a palindrome (8481221848).

The spelling of 3420111605 in words is "three billion, four hundred twenty million, one hundred eleven thousand, six hundred five".