2123319857 has 2 divisors, whose sum is σ = 2123319858. Its totient is φ = 2123319856.

The previous prime is 2123319841. The next prime is 2123319889. The reversal of 2123319857 is 7589133212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2083831201 + 39488656 = 45649^2 + 6284^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123319857 - 2⁴ = 2123319841 is a prime.

It is not a weakly prime, because it can be changed into another prime (2123319817) 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, 1061659928 + 1061659929.

It is an arithmetic number, because the mean of its divisors is an integer number (1061659929).

Almost surely, 2^2123319857 is an apocalyptic number.

It is an amenable number.

2123319857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123319857 is an equidigital number, since it uses as much as digits as its factorization.

2123319857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 2123319857 is about 46079.4949733610. The cubic root of 2123319857 is about 1285.3018729886.

The spelling of 2123319857 in words is "two billion, one hundred twenty-three million, three hundred nineteen thousand, eight hundred fifty-seven".