165019247 has 2 divisors, whose sum is σ = 165019248. Its totient is φ = 165019246.

The previous prime is 165019177. The next prime is 165019249. The reversal of 165019247 is 742910561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165019247 - 2¹⁰ = 165018223 is a prime.

Together with 165019249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165019249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82509623 + 82509624.

It is an arithmetic number, because the mean of its divisors is an integer number (82509624).

Almost surely, 2^165019247 is an apocalyptic number.

165019247 is a deficient number, since it is larger than the sum of its proper divisors (1).

165019247 is an equidigital number, since it uses as much as digits as its factorization.

165019247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 165019247 is about 12845.9817452774. The cubic root of 165019247 is about 548.5019808932.

The spelling of 165019247 in words is "one hundred sixty-five million, nineteen thousand, two hundred forty-seven".