165307943 has 4 divisors (see below), whose sum is σ = 165418008. Its totient is φ = 165197880.

The previous prime is 165307939. The next prime is 165307973. The reversal of 165307943 is 349703561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349703561 = 59 ⋅5927179.

It is a cyclic number.

It is not a de Polignac number, because 165307943 - 2² = 165307939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165307897 and 165307906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165307913) 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, 52748 + ... + 55793.

It is an arithmetic number, because the mean of its divisors is an integer number (41354502).

Almost surely, 2^165307943 is an apocalyptic number.

165307943 is a deficient number, since it is larger than the sum of its proper divisors (110065).

165307943 is a wasteful number, since it uses less digits than its factorization.

165307943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110064.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 165307943 is about 12857.2136561543. The cubic root of 165307943 is about 548.8216568854.

The spelling of 165307943 in words is "one hundred sixty-five million, three hundred seven thousand, nine hundred forty-three".