1000000993 has 2 divisors, whose sum is σ = 1000000994. Its totient is φ = 1000000992.

The previous prime is 1000000933. The next prime is 1000001011. The reversal of 1000000993 is 3990000001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 986399649 + 13601344 = 31407^2 + 3688^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000000993 - 2²⁵ = 966446561 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000000933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500000496 + 500000497.

It is an arithmetic number, because the mean of its divisors is an integer number (500000497).

Almost surely, 2^1000000993 is an apocalyptic number.

It is an amenable number.

1000000993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000000993 is an equidigital number, since it uses as much as digits as its factorization.

1000000993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 22.

The square root of 1000000993 is about 31622.7923023885. The cubic root of 1000000993 is about 1000.0003309999. Note that the first 3 decimals are identical.

Adding to 1000000993 its reverse (3990000001), we get a palindrome (4990000994).

The spelling of 1000000993 in words is "one billion, nine hundred ninety-three", and thus it is an aban number.