3981311 has 4 divisors (see below), whose sum is σ = 4088952. Its totient is φ = 3873672.

The previous prime is 3981301. The next prime is 3981331. The reversal of 3981311 is 1131893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3981311 - 2¹⁰ = 3980287 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53765 + ... + 53838.

It is an arithmetic number, because the mean of its divisors is an integer number (1022238).

Almost surely, 2^3981311 is an apocalyptic number.

3981311 is a deficient number, since it is larger than the sum of its proper divisors (107641).

3981311 is a wasteful number, since it uses less digits than its factorization.

3981311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107640.

The product of its digits is 648, while the sum is 26.

The square root of 3981311 is about 1995.3222797333. The cubic root of 3981311 is about 158.4924946772.

The spelling of 3981311 in words is "three million, nine hundred eighty-one thousand, three hundred eleven".