165852857 has 2 divisors, whose sum is σ = 165852858. Its totient is φ = 165852856.

The previous prime is 165852853. The next prime is 165852859. The reversal of 165852857 is 758258561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151191616 + 14661241 = 12296^2 + 3829^2 .

It is a cyclic number.

It is not a de Polignac number, because 165852857 - 2² = 165852853 is a prime.

Together with 165852859, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165852853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82926428 + 82926429.

It is an arithmetic number, because the mean of its divisors is an integer number (82926429).

Almost surely, 2^165852857 is an apocalyptic number.

It is an amenable number.

165852857 is a deficient number, since it is larger than the sum of its proper divisors (1).

165852857 is an equidigital number, since it uses as much as digits as its factorization.

165852857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672000, while the sum is 47.

The square root of 165852857 is about 12878.3872049259. The cubic root of 165852857 is about 549.4240328630.

The spelling of 165852857 in words is "one hundred sixty-five million, eight hundred fifty-two thousand, eight hundred fifty-seven".