845621053 has 2 divisors, whose sum is σ = 845621054. Its totient is φ = 845621052.

The previous prime is 845620999. The next prime is 845621159. The reversal of 845621053 is 350126548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 737502649 + 108118404 = 27157^2 + 10398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-845621053 is a prime.

It is a super-3 number, since 3×845621053³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (845624053) 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, 422810526 + 422810527.

It is an arithmetic number, because the mean of its divisors is an integer number (422810527).

Almost surely, 2^845621053 is an apocalyptic number.

It is an amenable number.

845621053 is a deficient number, since it is larger than the sum of its proper divisors (1).

845621053 is an equidigital number, since it uses as much as digits as its factorization.

845621053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 845621053 is about 29079.5641817411. The cubic root of 845621053 is about 945.6387544354.

The spelling of 845621053 in words is "eight hundred forty-five million, six hundred twenty-one thousand, fifty-three".