2161020293 has 2 divisors, whose sum is σ = 2161020294. Its totient is φ = 2161020292.

The previous prime is 2161020217. The next prime is 2161020311. The reversal of 2161020293 is 3920201612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1120441729 + 1040578564 = 33473^2 + 32258^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2161020293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161020203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080510146 + 1080510147.

It is an arithmetic number, because the mean of its divisors is an integer number (1080510147).

Almost surely, 2^2161020293 is an apocalyptic number.

It is an amenable number.

2161020293 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161020293 is an equidigital number, since it uses as much as digits as its factorization.

2161020293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2161020293 is about 46486.7754635660. The cubic root of 2161020293 is about 1292.8643148172.

The spelling of 2161020293 in words is "two billion, one hundred sixty-one million, twenty thousand, two hundred ninety-three".