2687129 has 2 divisors, whose sum is σ = 2687130. Its totient is φ = 2687128.

The previous prime is 2687123. The next prime is 2687141. The reversal of 2687129 is 9217862.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2647129 + 40000 = 1627^2 + 200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2687129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2687123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1343564 + 1343565.

It is an arithmetic number, because the mean of its divisors is an integer number (1343565).

2^2687129 is an apocalyptic number.

It is an amenable number.

2687129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2687129 is an equidigital number, since it uses as much as digits as its factorization.

2687129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 2687129 is about 1639.2464732309. The cubic root of 2687129 is about 139.0260462206.

The spelling of 2687129 in words is "two million, six hundred eighty-seven thousand, one hundred twenty-nine".