1001055993 has 8 divisors (see below), whose sum is σ = 1525418688. Its totient is φ = 572031984.

The previous prime is 1001055989. The next prime is 1001056087. The reversal of 1001055993 is 3995501001.

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

It is not a de Polignac number, because 1001055993 - 2² = 1001055989 is a prime.

It is a super-2 number, since 2×1001055993² = 2004226202242432098, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1001055493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23834646 + ... + 23834687.

It is an arithmetic number, because the mean of its divisors is an integer number (190677336).

Almost surely, 2^1001055993 is an apocalyptic number.

It is an amenable number.

1001055993 is a deficient number, since it is larger than the sum of its proper divisors (524362695).

1001055993 is an equidigital number, since it uses as much as digits as its factorization.

1001055993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47669343.

The product of its (nonzero) digits is 6075, while the sum is 33.

The square root of 1001055993 is about 31639.4689114719. The cubic root of 1001055993 is about 1000.3518738369.

Adding to 1001055993 its reverse (3995501001), we get a palindrome (4996556994).

The spelling of 1001055993 in words is "one billion, one million, fifty-five thousand, nine hundred ninety-three".