2071273661 has 2 divisors, whose sum is σ = 2071273662. Its totient is φ = 2071273660.

The previous prime is 2071273639. The next prime is 2071273667. The reversal of 2071273661 is 1663721702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1431487225 + 639786436 = 37835^2 + 25294^2 .

It is a cyclic number.

It is not a de Polignac number, because 2071273661 - 2³⁰ = 997531837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2071273667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1035636830 + 1035636831.

It is an arithmetic number, because the mean of its divisors is an integer number (1035636831).

Almost surely, 2^2071273661 is an apocalyptic number.

It is an amenable number.

2071273661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2071273661 is an equidigital number, since it uses as much as digits as its factorization.

2071273661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 2071273661 is about 45511.2476317668. The cubic root of 2071273661 is about 1274.7132326485.

The spelling of 2071273661 in words is "two billion, seventy-one million, two hundred seventy-three thousand, six hundred sixty-one".