1001994533 has 2 divisors, whose sum is σ = 1001994534. Its totient is φ = 1001994532.

The previous prime is 1001994523. The next prime is 1001994547. The reversal of 1001994533 is 3354991001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 967396609 + 34597924 = 31103^2 + 5882^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001994533 - 2¹⁴ = 1001978149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001994493 and 1001994502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001994523) 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, 500997266 + 500997267.

It is an arithmetic number, because the mean of its divisors is an integer number (500997267).

Almost surely, 2^1001994533 is an apocalyptic number.

It is an amenable number.

1001994533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001994533 is an equidigital number, since it uses as much as digits as its factorization.

1001994533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 1001994533 is about 31654.2972280226. The cubic root of 1001994533 is about 1000.6644028045.

The spelling of 1001994533 in words is "one billion, one million, nine hundred ninety-four thousand, five hundred thirty-three".