654644 has 6 divisors (see below), whose sum is σ = 1145634. Its totient is φ = 327320.

The previous prime is 654629. The next prime is 654671. The reversal of 654644 is 446456.

It can be written as a sum of positive squares in only one way, i.e., 504100 + 150544 = 710^2 + 388^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81827 + ... + 81834.

It is an arithmetic number, because the mean of its divisors is an integer number (190939).

2⁶⁵⁴⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

654644 is a deficient number, since it is larger than the sum of its proper divisors (490990).

654644 is a wasteful number, since it uses less digits than its factorization.

654644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163665 (or 163663 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 654644 is about 809.1007353847. The cubic root of 654644 is about 86.8297193425.

The spelling of 654644 in words is "six hundred fifty-four thousand, six hundred forty-four".