2689087771 has 2 divisors, whose sum is σ = 2689087772. Its totient is φ = 2689087770.

The previous prime is 2689087769. The next prime is 2689087831. The reversal of 2689087771 is 1777809862.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2689087771 - 2¹ = 2689087769 is a prime.

Together with 2689087769, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2689087571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344543885 + 1344543886.

It is an arithmetic number, because the mean of its divisors is an integer number (1344543886).

Almost surely, 2^2689087771 is an apocalyptic number.

2689087771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2689087771 is an equidigital number, since it uses as much as digits as its factorization.

2689087771 is an evil number, because the sum of its binary digits is even.

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

The square root of 2689087771 is about 51856.4149455012. The cubic root of 2689087771 is about 1390.5981882646.

The spelling of 2689087771 in words is "two billion, six hundred eighty-nine million, eighty-seven thousand, seven hundred seventy-one".