654977 has 4 divisors (see below), whose sum is σ = 661440. Its totient is φ = 648516.

The previous prime is 654967. The next prime is 654991. The reversal of 654977 is 779456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 654977.

It is not an unprimeable number, because it can be changed into a prime (654917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3077 + ... + 3282.

It is an arithmetic number, because the mean of its divisors is an integer number (165360).

2⁶⁵⁴⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

654977 is a deficient number, since it is larger than the sum of its proper divisors (6463).

654977 is a wasteful number, since it uses less digits than its factorization.

654977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6462.

The product of its digits is 52920, while the sum is 38.

The square root of 654977 is about 809.3064932397. The cubic root of 654977 is about 86.8444395036.

The spelling of 654977 in words is "six hundred fifty-four thousand, nine hundred seventy-seven".