100238785 has 4 divisors (see below), whose sum is σ = 120286548. Its totient is φ = 80191024.

The previous prime is 100238773. The next prime is 100238791. The reversal of 100238785 is 587832001.

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 49999041 + 50239744 = 7071^2 + 7088^2 .

It is a cyclic number.

It is not a de Polignac number, because 100238785 - 2⁵ = 100238753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100238785.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10023874 + ... + 10023883.

It is an arithmetic number, because the mean of its divisors is an integer number (30071637).

Almost surely, 2^100238785 is an apocalyptic number.

It is an amenable number.

100238785 is a deficient number, since it is larger than the sum of its proper divisors (20047763).

100238785 is an equidigital number, since it uses as much as digits as its factorization.

100238785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20047762.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 100238785 is about 10011.9321312122. The cubic root of 100238785 is about 464.5280369524.

The spelling of 100238785 in words is "one hundred million, two hundred thirty-eight thousand, seven hundred eighty-five".