654997 has 8 divisors (see below), whose sum is σ = 755136. Its totient is φ = 556512.

The previous prime is 654991. The next prime is 655001. The reversal of 654997 is 799456.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654991) 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, 618 + ... + 1300.

It is an arithmetic number, because the mean of its divisors is an integer number (94392).

2⁶⁵⁴⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

654997 is a deficient number, since it is larger than the sum of its proper divisors (100139).

654997 is a wasteful number, since it uses less digits than its factorization.

654997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827.

The product of its digits is 68040, while the sum is 40.

The square root of 654997 is about 809.3188494036. The cubic root of 654997 is about 86.8453234385.

The spelling of 654997 in words is "six hundred fifty-four thousand, nine hundred ninety-seven".