2161798607 has 2 divisors, whose sum is σ = 2161798608. Its totient is φ = 2161798606.

The previous prime is 2161798571. The next prime is 2161798621. The reversal of 2161798607 is 7068971612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2161798607 - 2⁸ = 2161798351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161798627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080899303 + 1080899304.

It is an arithmetic number, because the mean of its divisors is an integer number (1080899304).

Almost surely, 2^2161798607 is an apocalyptic number.

2161798607 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161798607 is an equidigital number, since it uses as much as digits as its factorization.

2161798607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 2161798607 is about 46495.1460584866. The cubic root of 2161798607 is about 1293.0195090433.

The spelling of 2161798607 in words is "two billion, one hundred sixty-one million, seven hundred ninety-eight thousand, six hundred seven".