654947 has 4 divisors (see below), whose sum is σ = 661176. Its totient is φ = 648720.

The previous prime is 654943. The next prime is 654967. The reversal of 654947 is 749456.

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 654947 - 2² = 654943 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654943) 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 3 ways as a sum of consecutive naturals, for example, 2954 + ... + 3167.

It is an arithmetic number, because the mean of its divisors is an integer number (165294).

2⁶⁵⁴⁹⁴⁷ is an apocalyptic number.

654947 is a deficient number, since it is larger than the sum of its proper divisors (6229).

654947 is a wasteful number, since it uses less digits than its factorization.

654947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6228.

The product of its digits is 30240, while the sum is 35.

The square root of 654947 is about 809.2879586402. The cubic root of 654947 is about 86.8431135675.

The spelling of 654947 in words is "six hundred fifty-four thousand, nine hundred forty-seven".