1021141993 has 2 divisors, whose sum is σ = 1021141994. Its totient is φ = 1021141992.

The previous prime is 1021141991. The next prime is 1021142039. The reversal of 1021141993 is 3991411201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 961744144 + 59397849 = 31012^2 + 7707^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021141993 - 2¹ = 1021141991 is a prime.

Together with 1021141991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1021141991) 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, 510570996 + 510570997.

It is an arithmetic number, because the mean of its divisors is an integer number (510570997).

Almost surely, 2^1021141993 is an apocalyptic number.

It is an amenable number.

1021141993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021141993 is an equidigital number, since it uses as much as digits as its factorization.

1021141993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1021141993 is about 31955.3124378404. The cubic root of 1021141993 is about 1006.9982413705.

The spelling of 1021141993 in words is "one billion, twenty-one million, one hundred forty-one thousand, nine hundred ninety-three".