165609203 has 2 divisors, whose sum is σ = 165609204. Its totient is φ = 165609202.

The previous prime is 165609163. The next prime is 165609217. The reversal of 165609203 is 302906561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165609203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165609203.

It is not a weakly prime, because it can be changed into another prime (165609233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82804601 + 82804602.

It is an arithmetic number, because the mean of its divisors is an integer number (82804602).

Almost surely, 2^165609203 is an apocalyptic number.

165609203 is a deficient number, since it is larger than the sum of its proper divisors (1).

165609203 is an equidigital number, since it uses as much as digits as its factorization.

165609203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 165609203 is about 12868.9239254881. The cubic root of 165609203 is about 549.1548485289.

The spelling of 165609203 in words is "one hundred sixty-five million, six hundred nine thousand, two hundred three".