3684981 has 4 divisors (see below), whose sum is σ = 4913312. Its totient is φ = 2456652.

The previous prime is 3684977. The next prime is 3685007. The reversal of 3684981 is 1894863.

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 3684981 - 2² = 3684977 is a prime.

It is a super-2 number, since 2×3684981² = 27158169940722, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3³ + 6⁵ + 8 + 4¹⁰ + 9⁶ + 8⁷ + 1 .

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3684181) 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, 614161 + ... + 614166.

It is an arithmetic number, because the mean of its divisors is an integer number (1228328).

Almost surely, 2^3684981 is an apocalyptic number.

It is an amenable number.

3684981 is a deficient number, since it is larger than the sum of its proper divisors (1228331).

3684981 is a wasteful number, since it uses less digits than its factorization.

3684981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228330.

The product of its digits is 41472, while the sum is 39.

The square root of 3684981 is about 1919.6304331824. The cubic root of 3684981 is about 154.4584779654.

The spelling of 3684981 in words is "three million, six hundred eighty-four thousand, nine hundred eighty-one".