165190943 has 4 divisors (see below), whose sum is σ = 167517648. Its totient is φ = 162864240.

The previous prime is 165190913. The next prime is 165190951. The reversal of 165190943 is 349091561.

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 165190943 - 2¹⁰ = 165189919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165190897 and 165190906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165190913) 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, 1163246 + ... + 1163387.

It is an arithmetic number, because the mean of its divisors is an integer number (41879412).

Almost surely, 2^165190943 is an apocalyptic number.

165190943 is a deficient number, since it is larger than the sum of its proper divisors (2326705).

165190943 is an equidigital number, since it uses as much as digits as its factorization.

165190943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326704.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 165190943 is about 12852.6628758402. The cubic root of 165190943 is about 548.6921464945.

The spelling of 165190943 in words is "one hundred sixty-five million, one hundred ninety thousand, nine hundred forty-three".