3971117 has 2 divisors, whose sum is σ = 3971118. Its totient is φ = 3971116.

The previous prime is 3971087. The next prime is 3971119. The reversal of 3971117 is 7111793.

3971117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2468041 + 1503076 = 1571^2 + 1226^2 .

It is a cyclic number.

It is not a de Polignac number, because 3971117 - 2⁶ = 3971053 is a prime.

Together with 3971119, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3971117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3971119) 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, 1985558 + 1985559.

It is an arithmetic number, because the mean of its divisors is an integer number (1985559).

Almost surely, 2^3971117 is an apocalyptic number.

It is an amenable number.

3971117 is a deficient number, since it is larger than the sum of its proper divisors (1).

3971117 is an equidigital number, since it uses as much as digits as its factorization.

3971117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1323, while the sum is 29.

The square root of 3971117 is about 1992.7661679184. The cubic root of 3971117 is about 158.3571076642.

The spelling of 3971117 in words is "three million, nine hundred seventy-one thousand, one hundred seventeen".