654811 has 4 divisors (see below), whose sum is σ = 670824. Its totient is φ = 638800.

The previous prime is 654803. The next prime is 654817. The reversal of 654811 is 118456.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 654811 - 2³ = 654803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7945 + ... + 8026.

It is an arithmetic number, because the mean of its divisors is an integer number (167706).

2⁶⁵⁴⁸¹¹ is an apocalyptic number.

654811 is a deficient number, since it is larger than the sum of its proper divisors (16013).

654811 is a wasteful number, since it uses less digits than its factorization.

654811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16012.

The product of its digits is 960, while the sum is 25.

The square root of 654811 is about 809.2039297977. The cubic root of 654811 is about 86.8371021492.

The spelling of 654811 in words is "six hundred fifty-four thousand, eight hundred eleven".