654891 has 8 divisors (see below), whose sum is σ = 924624. Its totient is φ = 410880.

The previous prime is 654889. The next prime is 654917. The reversal of 654891 is 198456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 654891 - 2¹ = 654889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (654821) 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 7 ways as a sum of consecutive naturals, for example, 6370 + ... + 6471.

It is an arithmetic number, because the mean of its divisors is an integer number (115578).

2⁶⁵⁴⁸⁹¹ is an apocalyptic number.

654891 is a deficient number, since it is larger than the sum of its proper divisors (269733).

654891 is a wasteful number, since it uses less digits than its factorization.

654891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12861.

The product of its digits is 8640, while the sum is 33.

The square root of 654891 is about 809.2533595852. The cubic root of 654891 is about 86.8406383784.

The spelling of 654891 in words is "six hundred fifty-four thousand, eight hundred ninety-one".