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164489 = 1312653
BaseRepresentation
bin101000001010001001
322100122012
4220022021
520230424
63305305
71253363
oct501211
9270565
10164489
11102646
127b235
1359b40
1443d33
1533b0e
hex28289

164489 has 4 divisors (see below), whose sum is σ = 177156. Its totient is φ = 151824.

The previous prime is 164477. The next prime is 164503. The reversal of 164489 is 984461.

It can be divided in two parts, 16 and 4489, that multiplied together give a square (71824 = 2682).

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8464 + 156025 = 92^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 164489 - 28 = 164233 is a prime.

It is a super-2 number, since 2×1644892 = 54113262242, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 164489.

It is not an unprimeable number, because it can be changed into a prime (164419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6314 + ... + 6339.

It is an arithmetic number, because the mean of its divisors is an integer number (44289).

2164489 is an apocalyptic number.

It is an amenable number.

164489 is a deficient number, since it is larger than the sum of its proper divisors (12667).

164489 is a wasteful number, since it uses less digits than its factorization.

164489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12666.

The product of its digits is 6912, while the sum is 32.

The square root of 164489 is about 405.5724349608. The cubic root of 164489 is about 54.7913860402.

The spelling of 164489 in words is "one hundred sixty-four thousand, four hundred eighty-nine".

Divisors: 1 13 12653 164489