3981347 has 4 divisors (see below), whose sum is σ = 4035960. Its totient is φ = 3926736.

The previous prime is 3981343. The next prime is 3981389. The reversal of 3981347 is 7431893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7431893 = 7 ⋅1061699.

It is a cyclic number.

It is not a de Polignac number, because 3981347 - 2² = 3981343 is a prime.

It is a super-2 number, since 2×3981347² = 31702247868818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3981343) 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, 27197 + ... + 27342.

It is an arithmetic number, because the mean of its divisors is an integer number (1008990).

Almost surely, 2^3981347 is an apocalyptic number.

3981347 is a deficient number, since it is larger than the sum of its proper divisors (54613).

3981347 is an equidigital number, since it uses as much as digits as its factorization.

3981347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54612.

The product of its digits is 18144, while the sum is 35.

The square root of 3981347 is about 1995.3313008120. The cubic root of 3981347 is about 158.4929723853.

The spelling of 3981347 in words is "three million, nine hundred eighty-one thousand, three hundred forty-seven".