165517983 has 12 divisors (see below), whose sum is σ = 245543688. Its totient is φ = 107362800.

The previous prime is 165517981. The next prime is 165518029. The reversal of 165517983 is 389715561.

It is a happy number.

165517983 is a `hidden beast` number, since 1 + 6 + 551 + 7 + 98 + 3 = 666.

It is not a de Polignac number, because 165517983 - 2¹ = 165517981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165517981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248193 + ... + 248858.

It is an arithmetic number, because the mean of its divisors is an integer number (20461974).

Almost surely, 2^165517983 is an apocalyptic number.

165517983 is a deficient number, since it is larger than the sum of its proper divisors (80025705).

165517983 is a wasteful number, since it uses less digits than its factorization.

165517983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497094 (or 497091 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 165517983 is about 12865.3792404266. The cubic root of 165517983 is about 549.0540024715.

The spelling of 165517983 in words is "one hundred sixty-five million, five hundred seventeen thousand, nine hundred eighty-three".