5805971921 has 2 divisors, whose sum is σ = 5805971922. Its totient is φ = 5805971920.

The previous prime is 5805971893. The next prime is 5805971923. The reversal of 5805971921 is 1291795085.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5443488400 + 362483521 = 73780^2 + 19039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5805971921 is a prime.

Together with 5805971923, 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 (5805971923) 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, 2902985960 + 2902985961.

It is an arithmetic number, because the mean of its divisors is an integer number (2902985961).

Almost surely, 2^5805971921 is an apocalyptic number.

It is an amenable number.

5805971921 is a deficient number, since it is larger than the sum of its proper divisors (1).

5805971921 is an equidigital number, since it uses as much as digits as its factorization.

5805971921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 47.

The square root of 5805971921 is about 76196.9285535841. The cubic root of 5805971921 is about 1797.3182205562.

The spelling of 5805971921 in words is "five billion, eight hundred five million, nine hundred seventy-one thousand, nine hundred twenty-one".