3871009 has 2 divisors, whose sum is σ = 3871010. Its totient is φ = 3871008.

The previous prime is 3870983. The next prime is 3871013. The reversal of 3871009 is 9001783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3139984 + 731025 = 1772^2 + 855^2 .

It is a cyclic number.

It is not a de Polignac number, because 3871009 - 2¹¹ = 3868961 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (3871039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1935504 + 1935505.

It is an arithmetic number, because the mean of its divisors is an integer number (1935505).

Almost surely, 2^3871009 is an apocalyptic number.

It is an amenable number.

3871009 is a deficient number, since it is larger than the sum of its proper divisors (1).

3871009 is an equidigital number, since it uses as much as digits as its factorization.

3871009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 3871009 is about 1967.4879923395. The cubic root of 3871009 is about 157.0150904396.

The spelling of 3871009 in words is "three million, eight hundred seventy-one thousand, nine".