654689 has 12 divisors (see below), whose sum is σ = 787968. Its totient is φ = 541800.

The previous prime is 654679. The next prime is 654697. The reversal of 654689 is 986456.

It is a de Polignac number, because none of the positive numbers 2^k-654689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1304 + ... + 1734.

It is an arithmetic number, because the mean of its divisors is an integer number (65664).

2⁶⁵⁴⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

654689 is a deficient number, since it is larger than the sum of its proper divisors (133279).

654689 is a wasteful number, since it uses less digits than its factorization.

654689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 469 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 654689 is about 809.1285435578. The cubic root of 654689 is about 86.8317088452.

The spelling of 654689 in words is "six hundred fifty-four thousand, six hundred eighty-nine".