168165243 has 12 divisors (see below), whose sum is σ = 246531688. Its totient is φ = 110436480.

The previous prime is 168165223. The next prime is 168165251. The reversal of 168165243 is 342561861.

It is a happy number.

It is not a de Polignac number, because 168165243 - 2⁵ = 168165211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168165198 and 168165207.

It is not an unprimeable number, because it can be changed into a prime (168165203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138838 + ... + 140043.

Almost surely, 2^168165243 is an apocalyptic number.

168165243 is a deficient number, since it is larger than the sum of its proper divisors (78366445).

168165243 is a wasteful number, since it uses less digits than its factorization.

168165243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278954 (or 278951 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 168165243 is about 12967.8542172558. The cubic root of 168165243 is about 551.9656858789.

The spelling of 168165243 in words is "one hundred sixty-eight million, one hundred sixty-five thousand, two hundred forty-three".