165782849 has 2 divisors, whose sum is σ = 165782850. Its totient is φ = 165782848.

The previous prime is 165782831. The next prime is 165782863. The reversal of 165782849 is 948287561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137639824 + 28143025 = 11732^2 + 5305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165782849 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 165782797 and 165782806.

It is not a weakly prime, because it can be changed into another prime (165782549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82891424 + 82891425.

It is an arithmetic number, because the mean of its divisors is an integer number (82891425).

Almost surely, 2^165782849 is an apocalyptic number.

It is an amenable number.

165782849 is a deficient number, since it is larger than the sum of its proper divisors (1).

165782849 is an equidigital number, since it uses as much as digits as its factorization.

165782849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 50.

The square root of 165782849 is about 12875.6688758293. The cubic root of 165782849 is about 549.3467163555.

The spelling of 165782849 in words is "one hundred sixty-five million, seven hundred eighty-two thousand, eight hundred forty-nine".