2687260789 has 2 divisors, whose sum is σ = 2687260790. Its totient is φ = 2687260788.

The previous prime is 2687260781. The next prime is 2687260813. The reversal of 2687260789 is 9870627862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1613387889 + 1073872900 = 40167^2 + 32770^2 .

It is a cyclic number.

It is not a de Polignac number, because 2687260789 - 2³ = 2687260781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2687260781) 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, 1343630394 + 1343630395.

It is an arithmetic number, because the mean of its divisors is an integer number (1343630395).

Almost surely, 2^2687260789 is an apocalyptic number.

It is an amenable number.

2687260789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2687260789 is an equidigital number, since it uses as much as digits as its factorization.

2687260789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4064256, while the sum is 55.

The square root of 2687260789 is about 51838.7961762231. The cubic root of 2687260789 is about 1390.2831900622.

The spelling of 2687260789 in words is "two billion, six hundred eighty-seven million, two hundred sixty thousand, seven hundred eighty-nine".