3981189 has 4 divisors (see below), whose sum is σ = 5308256. Its totient is φ = 2654124.

The previous prime is 3981181. The next prime is 3981191. The reversal of 3981189 is 9811893.

It is a happy number.

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 3981189 - 2³ = 3981181 is a prime.

It is a D-number.

It is a Duffinian number.

3981189 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981181) 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, 663529 + ... + 663534.

It is an arithmetic number, because the mean of its divisors is an integer number (1327064).

Almost surely, 2^3981189 is an apocalyptic number.

It is an amenable number.

3981189 is a deficient number, since it is larger than the sum of its proper divisors (1327067).

3981189 is a wasteful number, since it uses less digits than its factorization.

3981189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327066.

The product of its digits is 15552, while the sum is 39.

The square root of 3981189 is about 1995.2917079966. The cubic root of 3981189 is about 158.4908757564.

The spelling of 3981189 in words is "three million, nine hundred eighty-one thousand, one hundred eighty-nine".