3693861 has 12 divisors (see below), whose sum is σ = 5359692. Its totient is φ = 2451456.

The previous prime is 3693853. The next prime is 3693863. The reversal of 3693861 is 1683963.

It is a happy number.

3693861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2461761 + 1232100 = 1569^2 + 1110^2 .

It is not a de Polignac number, because 3693861 - 2³ = 3693853 is a prime.

3693861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3693863) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1515 + ... + 3111.

It is an arithmetic number, because the mean of its divisors is an integer number (446641).

Almost surely, 2^3693861 is an apocalyptic number.

It is an amenable number.

3693861 is a deficient number, since it is larger than the sum of its proper divisors (1665831).

3693861 is a wasteful number, since it uses less digits than its factorization.

3693861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860 (or 1857 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 3693861 is about 1921.9419866375. The cubic root of 3693861 is about 154.5824488454.

It can be divided in two parts, 3693 and 861, that added together give a palindrome (4554).

The spelling of 3693861 in words is "three million, six hundred ninety-three thousand, eight hundred sixty-one".