2680719787 has 4 divisors (see below), whose sum is σ = 2681025336. Its totient is φ = 2680414240.

The previous prime is 2680719779. The next prime is 2680719799. The reversal of 2680719787 is 7879170862.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2680719787 - 2³ = 2680719779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2680719187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139213 + ... + 157294.

It is an arithmetic number, because the mean of its divisors is an integer number (670256334).

Almost surely, 2^2680719787 is an apocalyptic number.

2680719787 is a deficient number, since it is larger than the sum of its proper divisors (305549).

2680719787 is an equidigital number, since it uses as much as digits as its factorization.

2680719787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305548.

The product of its (nonzero) digits is 2370816, while the sum is 55.

The square root of 2680719787 is about 51775.6679049146. The cubic root of 2680719787 is about 1389.1542544147.

The spelling of 2680719787 in words is "two billion, six hundred eighty million, seven hundred nineteen thousand, seven hundred eighty-seven".