1001243693 has 4 divisors (see below), whose sum is σ = 1001867580. Its totient is φ = 1000619808.

The previous prime is 1001243689. The next prime is 1001243699. The reversal of 1001243693 is 3963421001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 811851049 + 189392644 = 28493^2 + 13762^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001243693 - 2² = 1001243689 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001243699) 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 in 3 ways as a sum of consecutive naturals, for example, 309530 + ... + 312747.

It is an arithmetic number, because the mean of its divisors is an integer number (250466895).

Almost surely, 2^1001243693 is an apocalyptic number.

It is an amenable number.

1001243693 is a deficient number, since it is larger than the sum of its proper divisors (623887).

1001243693 is an equidigital number, since it uses as much as digits as its factorization.

1001243693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623886.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 1001243693 is about 31642.4350042787. The cubic root of 1001243693 is about 1000.4143925884.

Adding to 1001243693 its reverse (3963421001), we get a palindrome (4964664694).

The spelling of 1001243693 in words is "one billion, one million, two hundred forty-three thousand, six hundred ninety-three".