165842359 has 4 divisors (see below), whose sum is σ = 165929400. Its totient is φ = 165755320.

The previous prime is 165842323. The next prime is 165842371. The reversal of 165842359 is 953248561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 953248561 = 12577 ⋅75793.

It is a cyclic number.

It is not a de Polignac number, because 165842359 - 2²⁷ = 31624631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165842059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40597 + ... + 44494.

It is an arithmetic number, because the mean of its divisors is an integer number (41482350).

Almost surely, 2^165842359 is an apocalyptic number.

165842359 is a deficient number, since it is larger than the sum of its proper divisors (87041).

165842359 is an equidigital number, since it uses as much as digits as its factorization.

165842359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87040.

The product of its digits is 259200, while the sum is 43.

The square root of 165842359 is about 12877.9796163839. The cubic root of 165842359 is about 549.4124403078.

The spelling of 165842359 in words is "one hundred sixty-five million, eight hundred forty-two thousand, three hundred fifty-nine".