654993 has 16 divisors (see below), whose sum is σ = 1028160. Its totient is φ = 410688.

The previous prime is 654991. The next prime is 655001. The reversal of 654993 is 399456.

It is not a de Polignac number, because 654993 - 2¹ = 654991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (654991) 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, 255 + ... + 1172.

It is an arithmetic number, because the mean of its divisors is an integer number (64260).

2⁶⁵⁴⁹⁹³ is an apocalyptic number.

It is an amenable number.

654993 is a deficient number, since it is larger than the sum of its proper divisors (373167).

654993 is a wasteful number, since it uses less digits than its factorization.

654993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453 (or 1447 counting only the distinct ones).

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

The square root of 654993 is about 809.3163781859. The cubic root of 654993 is about 86.8451466529.

The spelling of 654993 in words is "six hundred fifty-four thousand, nine hundred ninety-three".