165992263 has 2 divisors, whose sum is σ = 165992264. Its totient is φ = 165992262.

The previous prime is 165992261. The next prime is 165992269. The reversal of 165992263 is 362299561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165992263 - 2¹ = 165992261 is a prime.

It is a super-2 number, since 2×165992263² = 55106862751722338, which contains 22 as substring.

Together with 165992261, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165992261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82996131 + 82996132.

It is an arithmetic number, because the mean of its divisors is an integer number (82996132).

Almost surely, 2^165992263 is an apocalyptic number.

165992263 is a deficient number, since it is larger than the sum of its proper divisors (1).

165992263 is an equidigital number, since it uses as much as digits as its factorization.

165992263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 43.

The square root of 165992263 is about 12883.7984693956. The cubic root of 165992263 is about 549.5779274220.

The spelling of 165992263 in words is "one hundred sixty-five million, nine hundred ninety-two thousand, two hundred sixty-three".