2087705 has 4 divisors (see below), whose sum is σ = 2505252. Its totient is φ = 1670160.

The previous prime is 2087689. The next prime is 2087711. The reversal of 2087705 is 5077802.

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 1630729 + 456976 = 1277^2 + 676^2 .

It is not a de Polignac number, because 2087705 - 2⁴ = 2087689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 8.

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, 208766 + ... + 208775.

It is an arithmetic number, because the mean of its divisors is an integer number (626313).

2^2087705 is an apocalyptic number.

It is an amenable number.

2087705 is a deficient number, since it is larger than the sum of its proper divisors (417547).

2087705 is an equidigital number, since it uses as much as digits as its factorization.

2087705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417546.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 2087705 is about 1444.8892691137. The cubic root of 2087705 is about 127.8075109691.

The spelling of 2087705 in words is "two million, eighty-seven thousand, seven hundred five".