3681091 has 4 divisors (see below), whose sum is σ = 3685032. Its totient is φ = 3677152.

The previous prime is 3681059. The next prime is 3681113. The reversal of 3681091 is 1901863.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1901863 = 293 ⋅6491.

It is a cyclic number.

It is not a de Polignac number, because 3681091 - 2⁵ = 3681059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3681001) 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, 315 + ... + 2731.

It is an arithmetic number, because the mean of its divisors is an integer number (921258).

Almost surely, 2^3681091 is an apocalyptic number.

3681091 is a deficient number, since it is larger than the sum of its proper divisors (3941).

3681091 is a wasteful number, since it uses less digits than its factorization.

3681091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3940.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 3681091 is about 1918.6169497844. The cubic root of 3681091 is about 154.4041081665.

The spelling of 3681091 in words is "three million, six hundred eighty-one thousand, ninety-one".