3381991 has 4 divisors (see below), whose sum is σ = 3391432. Its totient is φ = 3372552.

The previous prime is 3381971. The next prime is 3382003. The reversal of 3381991 is 1991833.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1991833 = 61 ⋅32653.

It is a cyclic number.

It is not a de Polignac number, because 3381991 - 2⁹ = 3381479 is a prime.

It is a super-2 number, since 2×3381991² = 22875726248162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3381971) 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, 4161 + ... + 4906.

It is an arithmetic number, because the mean of its divisors is an integer number (847858).

Almost surely, 2^3381991 is an apocalyptic number.

3381991 is a deficient number, since it is larger than the sum of its proper divisors (9441).

3381991 is an equidigital number, since it uses as much as digits as its factorization.

3381991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9440.

The product of its digits is 5832, while the sum is 34.

The square root of 3381991 is about 1839.0190319842. The cubic root of 3381991 is about 150.1034989404.

The spelling of 3381991 in words is "three million, three hundred eighty-one thousand, nine hundred ninety-one".