2106206999 has 4 divisors (see below), whose sum is σ = 2268222936. Its totient is φ = 1944191064.

The previous prime is 2106206969. The next prime is 2106207017. The reversal of 2106206999 is 9996026012.

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 2106206999 - 2²⁰ = 2105158423 is a prime.

It is a super-2 number, since 2×2106206999² = 8872215845273172002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106206969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81007949 + ... + 81007974.

It is an arithmetic number, because the mean of its divisors is an integer number (567055734).

Almost surely, 2^2106206999 is an apocalyptic number.

2106206999 is a deficient number, since it is larger than the sum of its proper divisors (162015937).

2106206999 is a wasteful number, since it uses less digits than its factorization.

2106206999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162015936.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 2106206999 is about 45893.4308915775. The cubic root of 2106206999 is about 1281.8395991485.

The spelling of 2106206999 in words is "two billion, one hundred six million, two hundred six thousand, nine hundred ninety-nine".