2509687 has 2 divisors, whose sum is σ = 2509688. Its totient is φ = 2509686.

The previous prime is 2509679. The next prime is 2509721. The reversal of 2509687 is 7869052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2509687 - 2³ = 2509679 is a prime.

It is a plaindrome in base 8.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2509627) 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, 1254843 + 1254844.

It is an arithmetic number, because the mean of its divisors is an integer number (1254844).

2^2509687 is an apocalyptic number.

2509687 is a deficient number, since it is larger than the sum of its proper divisors (1).

2509687 is an equidigital number, since it uses as much as digits as its factorization.

2509687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 2509687 is about 1584.1991667717. The cubic root of 2509687 is about 135.8959519918.

The spelling of 2509687 in words is "two million, five hundred nine thousand, six hundred eighty-seven".