3805689 has 4 divisors (see below), whose sum is σ = 5074256. Its totient is φ = 2537124.

The previous prime is 3805687. The next prime is 3805717. The reversal of 3805689 is 9865083.

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 3805689 - 2¹ = 3805687 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

3805689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3805687) 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, 634279 + ... + 634284.

It is an arithmetic number, because the mean of its divisors is an integer number (1268564).

Almost surely, 2^3805689 is an apocalyptic number.

It is an amenable number.

3805689 is a deficient number, since it is larger than the sum of its proper divisors (1268567).

3805689 is a wasteful number, since it uses less digits than its factorization.

3805689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268566.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 3805689 is about 1950.8175209383. The cubic root of 3805689 is about 156.1269102051.

The spelling of 3805689 in words is "three million, eight hundred five thousand, six hundred eighty-nine".