1001143993 has 8 divisors (see below), whose sum is σ = 1006819200. Its totient is φ = 995481648.

The previous prime is 1001143961. The next prime is 1001144021. The reversal of 1001143993 is 3993411001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1001143993 - 2⁵ = 1001143961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001143943) 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 in 7 ways as a sum of consecutive naturals, for example, 182038 + ... + 187456.

It is an arithmetic number, because the mean of its divisors is an integer number (125852400).

Almost surely, 2^1001143993 is an apocalyptic number.

It is an amenable number.

1001143993 is a deficient number, since it is larger than the sum of its proper divisors (5675207).

1001143993 is an equidigital number, since it uses as much as digits as its factorization.

1001143993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6431.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 1001143993 is about 31640.8595490072. The cubic root of 1001143993 is about 1000.3811856790.

Adding to 1001143993 its reverse (3993411001), we get a palindrome (4994554994).

The spelling of 1001143993 in words is "one billion, one million, one hundred forty-three thousand, nine hundred ninety-three".