3989181 has 8 divisors (see below), whose sum is σ = 6078784. Its totient is φ = 2279520.

The previous prime is 3989171. The next prime is 3989191. The reversal of 3989181 is 1819893.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3989171) and next prime (3989191).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3989181 - 2²¹ = 1892029 is a prime.

It is a super-2 number, since 2×3989181² = 31827130101522, which contains 22 as substring.

It is a Duffinian number.

3989181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94960 + ... + 95001.

It is an arithmetic number, because the mean of its divisors is an integer number (759848).

Almost surely, 2^3989181 is an apocalyptic number.

It is an amenable number.

3989181 is a deficient number, since it is larger than the sum of its proper divisors (2089603).

3989181 is a wasteful number, since it uses less digits than its factorization.

3989181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189971.

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

The square root of 3989181 is about 1997.2934186043. The cubic root of 3989181 is about 158.5968585371.

The spelling of 3989181 in words is "three million, nine hundred eighty-nine thousand, one hundred eighty-one".