3691705 has 4 divisors (see below), whose sum is σ = 4430052. Its totient is φ = 2953360.

The previous prime is 3691693. The next prime is 3691717. The reversal of 3691705 is 5071963.

3691705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5071963 = 13 ⋅390151.

It is an interprime number because it is at equal distance from previous prime (3691693) and next prime (3691717).

It can be written as a sum of positive squares in 2 ways, for example, as 2601769 + 1089936 = 1613^2 + 1044^2 .

It is not a de Polignac number, because 3691705 - 2⁵ = 3691673 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

3691705 is a lucky number.

It is an unprimeable number.

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, 369166 + ... + 369175.

It is an arithmetic number, because the mean of its divisors is an integer number (1107513).

Almost surely, 2^3691705 is an apocalyptic number.

It is an amenable number.

3691705 is a deficient number, since it is larger than the sum of its proper divisors (738347).

3691705 is an equidigital number, since it uses as much as digits as its factorization.

3691705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738346.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 3691705 is about 1921.3810137503. The cubic root of 3691705 is about 154.5523678883.

The spelling of 3691705 in words is "three million, six hundred ninety-one thousand, seven hundred five".