2087909 has 2 divisors, whose sum is σ = 2087910. Its totient is φ = 2087908.

The previous prime is 2087903. The next prime is 2087927. The reversal of 2087909 is 9097802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1555009 + 532900 = 1247^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 2087909 - 2¹² = 2083813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2087903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043954 + 1043955.

It is an arithmetic number, because the mean of its divisors is an integer number (1043955).

2^2087909 is an apocalyptic number.

It is an amenable number.

2087909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2087909 is an equidigital number, since it uses as much as digits as its factorization.

2087909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 2087909 is about 1444.9598610342. The cubic root of 2087909 is about 127.8116737353.

The spelling of 2087909 in words is "two million, eighty-seven thousand, nine hundred nine".