3981973 has 2 divisors, whose sum is σ = 3981974. Its totient is φ = 3981972.

The previous prime is 3981959. The next prime is 3982031. The reversal of 3981973 is 3791893.

3981973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3378244 + 603729 = 1838^2 + 777^2 .

It is a cyclic number.

It is not a de Polignac number, because 3981973 - 2²¹ = 1884821 is a prime.

It is a super-2 number, since 2×3981973² = 31712217945458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3981953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990986 + 1990987.

It is an arithmetic number, because the mean of its divisors is an integer number (1990987).

Almost surely, 2^3981973 is an apocalyptic number.

It is an amenable number.

3981973 is a deficient number, since it is larger than the sum of its proper divisors (1).

3981973 is an equidigital number, since it uses as much as digits as its factorization.

3981973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 3981973 is about 1995.4881608268. The cubic root of 3981973 is about 158.5012787366.

The spelling of 3981973 in words is "three million, nine hundred eighty-one thousand, nine hundred seventy-three".