100243333409 has 4 divisors (see below), whose sum is σ = 100252750404. Its totient is φ = 100233916416.

The previous prime is 100243333387. The next prime is 100243333447. The reversal of 100243333409 is 904333342001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 904333342001 = 281 ⋅3218268121.

It can be written as a sum of positive squares in 2 ways, for example, as 2229256225 + 98014077184 = 47215^2 + 313072^2 .

It is a cyclic number.

It is not a de Polignac number, because 100243333409 - 2⁸ = 100243333153 is a prime.

It is a super-2 number, since 2×100243333409² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100243333109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4692512 + ... + 4713825.

It is an arithmetic number, because the mean of its divisors is an integer number (25063187601).

Almost surely, 2^100243333409 is an apocalyptic number.

It is an amenable number.

100243333409 is a deficient number, since it is larger than the sum of its proper divisors (9416995).

100243333409 is an equidigital number, since it uses as much as digits as its factorization.

100243333409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9416994.

The product of its (nonzero) digits is 23328, while the sum is 32.

It can be divided in two parts, 10024 and 3333409, that added together give a palindrome (3343433).

The spelling of 100243333409 in words is "one hundred billion, two hundred forty-three million, three hundred thirty-three thousand, four hundred nine".