165693143 has 32 divisors (see below), whose sum is σ = 211438080. Its totient is φ = 126120960.

The previous prime is 165693139. The next prime is 165693161. The reversal of 165693143 is 341396561.

165693143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165693143 - 2² = 165693139 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 165693097 and 165693106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165693103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1191968 + ... + 1192106.

It is an arithmetic number, because the mean of its divisors is an integer number (6607440).

Almost surely, 2^165693143 is an apocalyptic number.

165693143 is a deficient number, since it is larger than the sum of its proper divisors (45744937).

165693143 is a wasteful number, since it uses less digits than its factorization.

165693143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407.

The product of its digits is 58320, while the sum is 38.

The square root of 165693143 is about 12872.1848572804. The cubic root of 165693143 is about 549.2476136477.

The spelling of 165693143 in words is "one hundred sixty-five million, six hundred ninety-three thousand, one hundred forty-three".