3980181 has 4 divisors (see below), whose sum is σ = 5306912. Its totient is φ = 2653452.

The previous prime is 3980161. The next prime is 3980191. The reversal of 3980181 is 1810893.

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 3980181 - 2⁶ = 3980117 is a prime.

It is a super-2 number, since 2×3980181² = 31683681585522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3980161) 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, 663361 + ... + 663366.

It is an arithmetic number, because the mean of its divisors is an integer number (1326728).

Almost surely, 2^3980181 is an apocalyptic number.

It is an amenable number.

3980181 is a deficient number, since it is larger than the sum of its proper divisors (1326731).

3980181 is a wasteful number, since it uses less digits than its factorization.

3980181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326730.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 3980181 is about 1995.0390973613. The cubic root of 3980181 is about 158.4774984892.

The spelling of 3980181 in words is "three million, nine hundred eighty thousand, one hundred eighty-one".