3949181 has 4 divisors (see below), whose sum is σ = 4008192. Its totient is φ = 3890172.

The previous prime is 3949177. The next prime is 3949193. The reversal of 3949181 is 1819493.

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 3949181 - 2² = 3949177 is a prime.

It is a super-2 number, since 2×3949181² = 31192061141522, 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 (3949111) 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, 29405 + ... + 29538.

It is an arithmetic number, because the mean of its divisors is an integer number (1002048).

Almost surely, 2^3949181 is an apocalyptic number.

It is an amenable number.

3949181 is a deficient number, since it is larger than the sum of its proper divisors (59011).

3949181 is an equidigital number, since it uses as much as digits as its factorization.

3949181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59010.

The product of its digits is 7776, while the sum is 35.

The square root of 3949181 is about 1987.2546389429. The cubic root of 3949181 is about 158.0649868862.

The spelling of 3949181 in words is "three million, nine hundred forty-nine thousand, one hundred eighty-one".