100820207 has 4 divisors (see below), whose sum is σ = 100884936. Its totient is φ = 100755480.

The previous prime is 100820191. The next prime is 100820221. The reversal of 100820207 is 702028001.

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

It is a cyclic number.

It is not a de Polignac number, because 100820207 - 2⁴ = 100820191 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 (100820267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29969 + ... + 33162.

It is an arithmetic number, because the mean of its divisors is an integer number (25221234).

Almost surely, 2^100820207 is an apocalyptic number.

100820207 is a deficient number, since it is larger than the sum of its proper divisors (64729).

100820207 is an equidigital number, since it uses as much as digits as its factorization.

100820207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64728.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 100820207 is about 10040.9266006679. The cubic root of 100820207 is about 465.4244507689.

Adding to 100820207 its reverse (702028001), we get a palindrome (802848208).

The spelling of 100820207 in words is "one hundred million, eight hundred twenty thousand, two hundred seven".