2173971563 has 2 divisors, whose sum is σ = 2173971564. Its totient is φ = 2173971562.

The previous prime is 2173971559. The next prime is 2173971599. The reversal of 2173971563 is 3651793712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2173971563 - 2² = 2173971559 is a prime.

It is not a weakly prime, because it can be changed into another prime (2173971263) 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, 1086985781 + 1086985782.

It is an arithmetic number, because the mean of its divisors is an integer number (1086985782).

Almost surely, 2^2173971563 is an apocalyptic number.

2173971563 is a deficient number, since it is larger than the sum of its proper divisors (1).

2173971563 is an equidigital number, since it uses as much as digits as its factorization.

2173971563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 44.

The square root of 2173971563 is about 46625.8679597496. The cubic root of 2173971563 is about 1295.4419391747.

The spelling of 2173971563 in words is "two billion, one hundred seventy-three million, nine hundred seventy-one thousand, five hundred sixty-three".