100989101 has 4 divisors (see below), whose sum is σ = 102123900. Its totient is φ = 99854304.

The previous prime is 100989089. The next prime is 100989209. The reversal of 100989101 is 101989001.

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 70728100 + 30261001 = 8410^2 + 5501^2 .

It is a cyclic number.

It is not a de Polignac number, because 100989101 - 2⁶ = 100989037 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 (100989701) 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, 567266 + ... + 567443.

It is an arithmetic number, because the mean of its divisors is an integer number (25530975).

Almost surely, 2^100989101 is an apocalyptic number.

It is an amenable number.

100989101 is a deficient number, since it is larger than the sum of its proper divisors (1134799).

100989101 is an equidigital number, since it uses as much as digits as its factorization.

100989101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134798.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 100989101 is about 10049.3333609747. Note that the first 4 decimals coincide. The cubic root of 100989101 is about 465.6841987763.

The spelling of 100989101 in words is "one hundred million, nine hundred eighty-nine thousand, one hundred one".