2071656689 has 2 divisors, whose sum is σ = 2071656690. Its totient is φ = 2071656688.

The previous prime is 2071656661. The next prime is 2071656701. The reversal of 2071656689 is 9866561702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1994515600 + 77141089 = 44660^2 + 8783^2 .

It is a cyclic number.

It is not a de Polignac number, because 2071656689 - 2²⁴ = 2054879473 is a prime.

It is a super-2 number, since 2×2071656689² = 8583522874156885442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2071656589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1035828344 + 1035828345.

It is an arithmetic number, because the mean of its divisors is an integer number (1035828345).

Almost surely, 2^2071656689 is an apocalyptic number.

It is an amenable number.

2071656689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2071656689 is an equidigital number, since it uses as much as digits as its factorization.

2071656689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 2071656689 is about 45515.4554959082. The cubic root of 2071656689 is about 1274.7918027857.

The spelling of 2071656689 in words is "two billion, seventy-one million, six hundred fifty-six thousand, six hundred eighty-nine".