2688720971 has 2 divisors, whose sum is σ = 2688720972. Its totient is φ = 2688720970.

The previous prime is 2688720959. The next prime is 2688721031. The reversal of 2688720971 is 1790278862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2688720971 - 2¹⁰ = 2688719947 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2688720271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344360485 + 1344360486.

It is an arithmetic number, because the mean of its divisors is an integer number (1344360486).

Almost surely, 2^2688720971 is an apocalyptic number.

2688720971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2688720971 is an equidigital number, since it uses as much as digits as its factorization.

2688720971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 2688720971 is about 51852.8781361266. The cubic root of 2688720971 is about 1390.5349580725.

The spelling of 2688720971 in words is "two billion, six hundred eighty-eight million, seven hundred twenty thousand, nine hundred seventy-one".