1020643133 has 2 divisors, whose sum is σ = 1020643134. Its totient is φ = 1020643132.

The previous prime is 1020643111. The next prime is 1020643177. The reversal of 1020643133 is 3313460201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 812649049 + 207994084 = 28507^2 + 14422^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020643133 - 2⁶ = 1020643069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020643099 and 1020643108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020643333) 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, 510321566 + 510321567.

It is an arithmetic number, because the mean of its divisors is an integer number (510321567).

Almost surely, 2^1020643133 is an apocalyptic number.

It is an amenable number.

1020643133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020643133 is an equidigital number, since it uses as much as digits as its factorization.

1020643133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 1020643133 is about 31947.5058963920. The cubic root of 1020643133 is about 1006.8342312155.

The spelling of 1020643133 in words is "one billion, twenty million, six hundred forty-three thousand, one hundred thirty-three".