654939 has 16 divisors (see below), whose sum is σ = 983040. Its totient is φ = 430920.

The previous prime is 654931. The next prime is 654943. The reversal of 654939 is 939456.

It is not a de Polignac number, because 654939 - 2³ = 654931 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (654931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3334 + ... + 3524.

It is an arithmetic number, because the mean of its divisors is an integer number (61440).

2⁶⁵⁴⁹³⁹ is an apocalyptic number.

654939 is a deficient number, since it is larger than the sum of its proper divisors (328101).

654939 is a wasteful number, since it uses less digits than its factorization.

654939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327 (or 321 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 654939 is about 809.2830160086. The cubic root of 654939 is about 86.8427599777.

It can be divided in two parts, 6 and 54939, that added together give a palindrome (54945).

The spelling of 654939 in words is "six hundred fifty-four thousand, nine hundred thirty-nine".