165622943 has 4 divisors (see below), whose sum is σ = 174339960. Its totient is φ = 156905928.

The previous prime is 165622939. The next prime is 165622957. The reversal of 165622943 is 349226561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165622943 - 2² = 165622939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165622897 and 165622906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165622343) 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, 4358480 + ... + 4358517.

It is an arithmetic number, because the mean of its divisors is an integer number (43584990).

Almost surely, 2^165622943 is an apocalyptic number.

165622943 is a deficient number, since it is larger than the sum of its proper divisors (8717017).

165622943 is an equidigital number, since it uses as much as digits as its factorization.

165622943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8717016.

The product of its digits is 77760, while the sum is 38.

The square root of 165622943 is about 12869.4577585849. The cubic root of 165622943 is about 549.1700352432.

The spelling of 165622943 in words is "one hundred sixty-five million, six hundred twenty-two thousand, nine hundred forty-three".