165687359 has 8 divisors (see below), whose sum is σ = 167650560. Its totient is φ = 163735000.

The previous prime is 165687337. The next prime is 165687367. The reversal of 165687359 is 953786561.

It is a happy number.

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 165687359 - 2⁸ = 165687103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165687059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30362 + ... + 35400.

It is an arithmetic number, because the mean of its divisors is an integer number (20956320).

Almost surely, 2^165687359 is an apocalyptic number.

165687359 is a deficient number, since it is larger than the sum of its proper divisors (1963201).

165687359 is a wasteful number, since it uses less digits than its factorization.

165687359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5421.

The product of its digits is 1360800, while the sum is 50.

The square root of 165687359 is about 12871.9601848359. The cubic root of 165687359 is about 549.2412225460.

The spelling of 165687359 in words is "one hundred sixty-five million, six hundred eighty-seven thousand, three hundred fifty-nine".