165389983 has 8 divisors (see below), whose sum is σ = 181216080. Its totient is φ = 149695680.

The previous prime is 165389933. The next prime is 165389993. The reversal of 165389983 is 389983561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165389983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165389983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165389933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30310 + ... + 35347.

It is an arithmetic number, because the mean of its divisors is an integer number (22652010).

Almost surely, 2^165389983 is an apocalyptic number.

165389983 is a deficient number, since it is larger than the sum of its proper divisors (15826097).

165389983 is a wasteful number, since it uses less digits than its factorization.

165389983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65897.

The product of its digits is 1399680, while the sum is 52.

The square root of 165389983 is about 12860.4036872876. The cubic root of 165389983 is about 548.9124326854.

The spelling of 165389983 in words is "one hundred sixty-five million, three hundred eighty-nine thousand, nine hundred eighty-three".