10206109 has 4 divisors (see below), whose sum is σ = 10248700. Its totient is φ = 10163520.

The previous prime is 10206107. The next prime is 10206121. The reversal of 10206109 is 90160201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90160201 = 59 ⋅1528139.

It can be written as a sum of positive squares in 2 ways, for example, as 9018009 + 1188100 = 3003^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 10206109 - 2¹ = 10206107 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 (10206107) 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, 20934 + ... + 21415.

It is an arithmetic number, because the mean of its divisors is an integer number (2562175).

Almost surely, 2^10206109 is an apocalyptic number.

It is an amenable number.

10206109 is a deficient number, since it is larger than the sum of its proper divisors (42591).

10206109 is an equidigital number, since it uses as much as digits as its factorization.

10206109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42590.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 10206109 is about 3194.7001424234. The cubic root of 10206109 is about 216.9135759820.

The spelling of 10206109 in words is "ten million, two hundred six thousand, one hundred nine".