200122309 has 4 divisors (see below), whose sum is σ = 202103820. Its totient is φ = 198140800.

The previous prime is 200122297. The next prime is 200122319. The reversal of 200122309 is 903221002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 903221002 = 2 ⋅451610501.

It can be written as a sum of positive squares in 2 ways, for example, as 103591684 + 96530625 = 10178^2 + 9825^2 .

It is a cyclic number.

It is not a de Polignac number, because 200122309 - 2²⁷ = 65904581 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 (200122319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 990604 + ... + 990805.

It is an arithmetic number, because the mean of its divisors is an integer number (50525955).

Almost surely, 2^200122309 is an apocalyptic number.

It is an amenable number.

200122309 is a deficient number, since it is larger than the sum of its proper divisors (1981511).

200122309 is a wasteful number, since it uses less digits than its factorization.

200122309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981510.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 200122309 is about 14146.4592389757. The cubic root of 200122309 is about 584.9227345783.

It can be divided in two parts, 2001 and 22309, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 200122309 in words is "two hundred million, one hundred twenty-two thousand, three hundred nine".