654169 has 2 divisors, whose sum is σ = 654170. Its totient is φ = 654168.

The previous prime is 654167. The next prime is 654187. The reversal of 654169 is 961456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 416025 + 238144 = 645^2 + 488^2 .

It is a cyclic number.

It is not a de Polignac number, because 654169 - 2¹ = 654167 is a prime.

It is a super-2 number, since 2×654169² = 855874161122, which contains 22 as substring.

Together with 654167, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 654169.

It is not a weakly prime, because it can be changed into another prime (654161) 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 as a sum of consecutive naturals, namely, 327084 + 327085.

It is an arithmetic number, because the mean of its divisors is an integer number (327085).

2⁶⁵⁴¹⁶⁹ is an apocalyptic number.

It is an amenable number.

654169 is a deficient number, since it is larger than the sum of its proper divisors (1).

654169 is an equidigital number, since it uses as much as digits as its factorization.

654169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 654169 is about 808.8071463581. The cubic root of 654169 is about 86.8087134747.

The spelling of 654169 in words is "six hundred fifty-four thousand, one hundred sixty-nine".