2387909 has 2 divisors, whose sum is σ = 2387910. Its totient is φ = 2387908.

The previous prime is 2387897. The next prime is 2387911. The reversal of 2387909 is 9097832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2356225 + 31684 = 1535^2 + 178^2 .

It is a cyclic number.

It is not a de Polignac number, because 2387909 - 2¹² = 2383813 is a prime.

It is a Sophie Germain prime.

Together with 2387911, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2387969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1193954 + 1193955.

It is an arithmetic number, because the mean of its divisors is an integer number (1193955).

2^2387909 is an apocalyptic number.

It is an amenable number.

2387909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2387909 is an equidigital number, since it uses as much as digits as its factorization.

2387909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 2387909 is about 1545.2860576605. The cubic root of 2387909 is about 133.6613748925.

The spelling of 2387909 in words is "two million, three hundred eighty-seven thousand, nine hundred nine".