100820107 has 4 divisors (see below), whose sum is σ = 103279176. Its totient is φ = 98361040.

The previous prime is 100820053. The next prime is 100820143. The reversal of 100820107 is 701028001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100820107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100820147) 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, 1229473 + ... + 1229554.

It is an arithmetic number, because the mean of its divisors is an integer number (25819794).

Almost surely, 2^100820107 is an apocalyptic number.

100820107 is a deficient number, since it is larger than the sum of its proper divisors (2459069).

100820107 is an equidigital number, since it uses as much as digits as its factorization.

100820107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459068.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 100820107 is about 10040.9216210465. The cubic root of 100820107 is about 465.4242968894.

Adding to 100820107 its reverse (701028001), we get a palindrome (801848108).

It can be divided in two parts, 1008 and 20107, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 100820107 in words is "one hundred million, eight hundred twenty thousand, one hundred seven".