2081797769 has 2 divisors, whose sum is σ = 2081797770. Its totient is φ = 2081797768.

The previous prime is 2081797717. The next prime is 2081797771. The reversal of 2081797769 is 9677971802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1172172169 + 909625600 = 34237^2 + 30160^2 .

It is a cyclic number.

It is not a de Polignac number, because 2081797769 - 2¹² = 2081793673 is a prime.

It is a super-2 number, since 2×2081797769² = 8667763902026754722, which contains 22 as substring.

Together with 2081797771, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2081790769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040898884 + 1040898885.

It is an arithmetic number, because the mean of its divisors is an integer number (1040898885).

Almost surely, 2^2081797769 is an apocalyptic number.

It is an amenable number.

2081797769 is a deficient number, since it is larger than the sum of its proper divisors (1).

2081797769 is an equidigital number, since it uses as much as digits as its factorization.

2081797769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2667168, while the sum is 56.

The square root of 2081797769 is about 45626.7220935276. The cubic root of 2081797769 is about 1276.8685188801.

The spelling of 2081797769 in words is "two billion, eighty-one million, seven hundred ninety-seven thousand, seven hundred sixty-nine".