4187009 has 2 divisors, whose sum is σ = 4187010. Its totient is φ = 4187008.

The previous prime is 4186999. The next prime is 4187021. The reversal of 4187009 is 9007814.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3591025 + 595984 = 1895^2 + 772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4187009 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (4187059) 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, 2093504 + 2093505.

It is an arithmetic number, because the mean of its divisors is an integer number (2093505).

Almost surely, 2^4187009 is an apocalyptic number.

It is an amenable number.

4187009 is a deficient number, since it is larger than the sum of its proper divisors (1).

4187009 is an equidigital number, since it uses as much as digits as its factorization.

4187009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 4187009 is about 2046.2182190568. The cubic root of 4187009 is about 161.1763431800.

The spelling of 4187009 in words is "four million, one hundred eighty-seven thousand, nine".