3871669 has 2 divisors, whose sum is σ = 3871670. Its totient is φ = 3871668.

The previous prime is 3871663. The next prime is 3871691. The reversal of 3871669 is 9661783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3802500 + 69169 = 1950^2 + 263^2 .

It is an emirp because it is prime and its reverse (9661783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3871669 - 2³ = 3871661 is a prime.

It is a super-2 number, since 2×3871669² = 29979641691122, which contains 22 as substring.

3871669 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3871661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1935834 + 1935835.

It is an arithmetic number, because the mean of its divisors is an integer number (1935835).

Almost surely, 2^3871669 is an apocalyptic number.

It is an amenable number.

3871669 is a deficient number, since it is larger than the sum of its proper divisors (1).

3871669 is an equidigital number, since it uses as much as digits as its factorization.

3871669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 3871669 is about 1967.6557117545. The cubic root of 3871669 is about 157.0240135284.

The spelling of 3871669 in words is "three million, eight hundred seventy-one thousand, six hundred sixty-nine".