2005617 has 4 divisors (see below), whose sum is σ = 2674160. Its totient is φ = 1337076.

The previous prime is 2005613. The next prime is 2005667. The reversal of 2005617 is 7165002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2005617 - 2² = 2005613 is a prime.

It is a D-number.

It is a Duffinian number.

2005617 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2005593 and 2005602.

It is not an unprimeable number, because it can be changed into a prime (2005613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334267 + ... + 334272.

It is an arithmetic number, because the mean of its divisors is an integer number (668540).

2^2005617 is an apocalyptic number.

It is an amenable number.

2005617 is a deficient number, since it is larger than the sum of its proper divisors (668543).

2005617 is an equidigital number, since it uses as much as digits as its factorization.

2005617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668542.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 2005617 is about 1416.1980793660. The cubic root of 2005617 is about 126.1099443499.

The spelling of 2005617 in words is "two million, five thousand, six hundred seventeen".