100814785 has 4 divisors (see below), whose sum is σ = 120977748. Its totient is φ = 80651824.

The previous prime is 100814783. The next prime is 100814803. The reversal of 100814785 is 587418001.

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 21818241 + 78996544 = 4671^2 + 8888^2 .

It is a cyclic number.

It is not a de Polignac number, because 100814785 - 2¹ = 100814783 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 100814785.

It is not an unprimeable number, because it can be changed into a prime (100814783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10081474 + ... + 10081483.

It is an arithmetic number, because the mean of its divisors is an integer number (30244437).

Almost surely, 2^100814785 is an apocalyptic number.

It is an amenable number.

100814785 is a deficient number, since it is larger than the sum of its proper divisors (20162963).

100814785 is an equidigital number, since it uses as much as digits as its factorization.

100814785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20162962.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 100814785 is about 10040.6566020355. The cubic root of 100814785 is about 465.4161072807.

The spelling of 100814785 in words is "one hundred million, eight hundred fourteen thousand, seven hundred eighty-five".