3911081 has 4 divisors (see below), whose sum is σ = 4081152. Its totient is φ = 3741012.

The previous prime is 3911077. The next prime is 3911087. The reversal of 3911081 is 1801193.

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 a cyclic number.

It is not a de Polignac number, because 3911081 - 2² = 3911077 is a prime.

It is a super-3 number, since 3×3911081³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 170047 = 3911081 / (3 + 9 + 1 + 1 + 0 + 8 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3911087) 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, 85001 + ... + 85046.

It is an arithmetic number, because the mean of its divisors is an integer number (1020288).

Almost surely, 2^3911081 is an apocalyptic number.

It is an amenable number.

3911081 is a deficient number, since it is larger than the sum of its proper divisors (170071).

3911081 is a wasteful number, since it uses less digits than its factorization.

3911081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170070.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 3911081 is about 1977.6453170374. The cubic root of 3911081 is about 157.5550290620. Note that the first 3 decimals are identical.

The spelling of 3911081 in words is "three million, nine hundred eleven thousand, eighty-one".