10081993 has 2 divisors, whose sum is σ = 10081994. Its totient is φ = 10081992.

The previous prime is 10081991. The next prime is 10081997. The reversal of 10081993 is 39918001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9437184 + 644809 = 3072^2 + 803^2 .

It is a cyclic number.

It is not a de Polignac number, because 10081993 - 2¹ = 10081991 is a prime.

Together with 10081991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10081991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5040996 + 5040997.

It is an arithmetic number, because the mean of its divisors is an integer number (5040997).

Almost surely, 2^10081993 is an apocalyptic number.

It is an amenable number.

10081993 is a deficient number, since it is larger than the sum of its proper divisors (1).

10081993 is an equidigital number, since it uses as much as digits as its factorization.

10081993 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 10081993 is about 3175.2154257625. The cubic root of 10081993 is about 216.0306955119.

Adding to 10081993 its reverse (39918001), we get a palindrome (49999994).

The spelling of 10081993 in words is "ten million, eighty-one thousand, nine hundred ninety-three".