Search a number
-
+
164609 = 971697
BaseRepresentation
bin101000001100000001
322100210122
4220030001
520231414
63310025
71253624
oct501401
9270718
10164609
11102745
127b315
1359c03
1443dbb
1533b8e
hex28301

164609 has 4 divisors (see below), whose sum is σ = 166404. Its totient is φ = 162816.

The previous prime is 164599. The next prime is 164617. The reversal of 164609 is 906461.

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 124609 + 40000 = 353^2 + 200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-164609 is a prime.

It is a super-2 number, since 2×1646092 = 54192245762, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752 + ... + 945.

It is an arithmetic number, because the mean of its divisors is an integer number (41601).

2164609 is an apocalyptic number.

It is an amenable number.

164609 is a deficient number, since it is larger than the sum of its proper divisors (1795).

164609 is an equidigital number, since it uses as much as digits as its factorization.

164609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 164609 is about 405.7203470372. The cubic root of 164609 is about 54.8047068257.

The spelling of 164609 in words is "one hundred sixty-four thousand, six hundred nine".

Divisors: 1 97 1697 164609