2174516891 has 2 divisors, whose sum is σ = 2174516892. Its totient is φ = 2174516890.

The previous prime is 2174516887. The next prime is 2174516893. The reversal of 2174516891 is 1986154712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2174516891 - 2² = 2174516887 is a prime.

Together with 2174516893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2174516893) 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, 1087258445 + 1087258446.

It is an arithmetic number, because the mean of its divisors is an integer number (1087258446).

Almost surely, 2^2174516891 is an apocalyptic number.

2174516891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2174516891 is an equidigital number, since it uses as much as digits as its factorization.

2174516891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 44.

The square root of 2174516891 is about 46631.7155056513. The cubic root of 2174516891 is about 1295.5502481200.

The spelling of 2174516891 in words is "two billion, one hundred seventy-four million, five hundred sixteen thousand, eight hundred ninety-one".