Search a number
-
+
169661 is a prime number
BaseRepresentation
bin101001011010111101
322121201202
4221122331
520412121
63345245
71304432
oct513275
9277652
10169661
11106518
1282225
135c2bb
1445b89
153540b
hex296bd

169661 has 2 divisors, whose sum is σ = 169662. Its totient is φ = 169660.

The previous prime is 169657. The next prime is 169667. The reversal of 169661 is 166961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136900 + 32761 = 370^2 + 181^2 .

It is a cyclic number.

It is not a de Polignac number, because 169661 - 22 = 169657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84830 + 84831.

It is an arithmetic number, because the mean of its divisors is an integer number (84831).

2169661 is an apocalyptic number.

It is an amenable number.

169661 is a deficient number, since it is larger than the sum of its proper divisors (1).

169661 is an equidigital number, since it uses as much as digits as its factorization.

169661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 29.

The square root of 169661 is about 411.8992595283. The cubic root of 169661 is about 55.3597356300.

The spelling of 169661 in words is "one hundred sixty-nine thousand, six hundred sixty-one".