3944981 has 4 divisors (see below), whose sum is σ = 3967200. Its totient is φ = 3922764.

The previous prime is 3944953. The next prime is 3944987. The reversal of 3944981 is 1894493.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1894493 = 71 ⋅26683.

It is a cyclic number.

It is not a de Polignac number, because 3944981 - 2¹⁰ = 3943957 is a prime.

It is a super-2 number, since 2×3944981² = 31125750180722, 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 (3944987) 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, 10841 + ... + 11198.

It is an arithmetic number, because the mean of its divisors is an integer number (991800).

Almost surely, 2^3944981 is an apocalyptic number.

It is an amenable number.

3944981 is a deficient number, since it is larger than the sum of its proper divisors (22219).

3944981 is a wasteful number, since it uses less digits than its factorization.

3944981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22218.

The product of its digits is 31104, while the sum is 38.

The square root of 3944981 is about 1986.1976236014. The cubic root of 3944981 is about 158.0089323583.

The spelling of 3944981 in words is "three million, nine hundred forty-four thousand, nine hundred eighty-one".