654493 has 18 divisors (see below), whose sum is σ = 825246. Its totient is φ = 517104.

The previous prime is 654491. The next prime is 654499. The reversal of 654493 is 394456.

It can be written as a sum of positive squares in only one way, i.e., 636804 + 17689 = 798^2 + 133^2 .

It is not a de Polignac number, because 654493 - 2¹ = 654491 is a prime.

It is a super-2 number, since 2×654493² = 856722174098, which contains 22 as substring.

654493 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654491) 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 17 ways as a sum of consecutive naturals, for example, 17671 + ... + 17707.

It is an arithmetic number, because the mean of its divisors is an integer number (45847).

2⁶⁵⁴⁴⁹³ is an apocalyptic number.

It is an amenable number.

654493 is a deficient number, since it is larger than the sum of its proper divisors (170753).

654493 is a wasteful number, since it uses less digits than its factorization.

654493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 63 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 654493 is about 809.0074165297. The cubic root of 654493 is about 86.8230427897.

The spelling of 654493 in words is "six hundred fifty-four thousand, four hundred ninety-three".