165559493 has 8 divisors (see below), whose sum is σ = 180778656. Its totient is φ = 150368400.

The previous prime is 165559477. The next prime is 165559523. The reversal of 165559493 is 394955561.

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

It is a cyclic number.

It is not a de Polignac number, because 165559493 - 2⁴ = 165559477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165559193) 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, 6455 + ... + 19307.

It is an arithmetic number, because the mean of its divisors is an integer number (22597332).

Almost surely, 2^165559493 is an apocalyptic number.

It is an amenable number.

165559493 is a deficient number, since it is larger than the sum of its proper divisors (15219163).

165559493 is a wasteful number, since it uses less digits than its factorization.

165559493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14035.

The product of its digits is 729000, while the sum is 47.

The square root of 165559493 is about 12866.9923836148. The cubic root of 165559493 is about 549.0998974376.

The spelling of 165559493 in words is "one hundred sixty-five million, five hundred fifty-nine thousand, four hundred ninety-three".