1001009999993 has 2 divisors, whose sum is σ = 1001009999994. Its totient is φ = 1001009999992.

The previous prime is 1001009999981. The next prime is 1001010000013. The reversal of 1001009999993 is 3999999001001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 982017577024 + 18992422969 = 990968^2 + 137813^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001009999993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001009990993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500504999996 + 500504999997.

It is an arithmetic number, because the mean of its divisors is an integer number (500504999997).

Almost surely, 2^{1001009999993} is an apocalyptic number.

It is an amenable number.

1001009999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001009999993 is an equidigital number, since it uses as much as digits as its factorization.

1001009999993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1594323, while the sum is 59.

It can be divided in two parts, 1001009 and 999993, that added together give a palindrome (2001002).

The spelling of 1001009999993 in words is "one trillion, one billion, nine million, nine hundred ninety-nine thousand, nine hundred ninety-three".