2165970893 has 2 divisors, whose sum is σ = 2165970894. Its totient is φ = 2165970892.

The previous prime is 2165970869. The next prime is 2165970907. The reversal of 2165970893 is 3980795612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1747072804 + 418898089 = 41798^2 + 20467^2 .

It is a cyclic number.

It is not a de Polignac number, because 2165970893 - 2¹⁴ = 2165954509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2165970853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082985446 + 1082985447.

It is an arithmetic number, because the mean of its divisors is an integer number (1082985447).

Almost surely, 2^2165970893 is an apocalyptic number.

It is an amenable number.

2165970893 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165970893 is an equidigital number, since it uses as much as digits as its factorization.

2165970893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 2165970893 is about 46539.9924043827. The cubic root of 2165970893 is about 1293.8508199399.

The spelling of 2165970893 in words is "two billion, one hundred sixty-five million, nine hundred seventy thousand, eight hundred ninety-three".