165199247 has 2 divisors, whose sum is σ = 165199248. Its totient is φ = 165199246.

The previous prime is 165199213. The next prime is 165199267. The reversal of 165199247 is 742991561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165199247 - 2¹⁰ = 165198223 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 165199198 and 165199207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165199207) 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 as a sum of consecutive naturals, namely, 82599623 + 82599624.

It is an arithmetic number, because the mean of its divisors is an integer number (82599624).

Almost surely, 2^165199247 is an apocalyptic number.

165199247 is a deficient number, since it is larger than the sum of its proper divisors (1).

165199247 is an equidigital number, since it uses as much as digits as its factorization.

165199247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 165199247 is about 12852.9859176769. The cubic root of 165199247 is about 548.7013404272.

The spelling of 165199247 in words is "one hundred sixty-five million, one hundred ninety-nine thousand, two hundred forty-seven".