201200009 has 2 divisors, whose sum is σ = 201200010. Its totient is φ = 201200008.

The previous prime is 201199963. The next prime is 201200017. The reversal of 201200009 is 900002102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184878409 + 16321600 = 13597^2 + 4040^2 .

It is a cyclic number.

It is not a de Polignac number, because 201200009 - 2¹² = 201195913 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 201199966 and 201200002.

It is not a weakly prime, because it can be changed into another prime (201200059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100600004 + 100600005.

It is an arithmetic number, because the mean of its divisors is an integer number (100600005).

Almost surely, 2^201200009 is an apocalyptic number.

It is an amenable number.

201200009 is a deficient number, since it is larger than the sum of its proper divisors (1).

201200009 is an equidigital number, since it uses as much as digits as its factorization.

201200009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 201200009 is about 14184.4988984454. The cubic root of 201200009 is about 585.9708320271.

The spelling of 201200009 in words is "two hundred one million, two hundred thousand, nine".