845233311893 has 2 divisors, whose sum is σ = 845233311894. Its totient is φ = 845233311892.

The previous prime is 845233311803. The next prime is 845233311977. The reversal of 845233311893 is 398113332548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 468756576964 + 376476734929 = 684658^2 + 613577^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-845233311893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (845233311803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422616655946 + 422616655947.

It is an arithmetic number, because the mean of its divisors is an integer number (422616655947).

Almost surely, 2^845233311893 is an apocalyptic number.

It is an amenable number.

845233311893 is a deficient number, since it is larger than the sum of its proper divisors (1).

845233311893 is an equidigital number, since it uses as much as digits as its factorization.

845233311893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 50.

The spelling of 845233311893 in words is "eight hundred forty-five billion, two hundred thirty-three million, three hundred eleven thousand, eight hundred ninety-three".