654399 has 12 divisors (see below), whose sum is σ = 980616. Its totient is φ = 436104.

The previous prime is 654397. The next prime is 654413. The reversal of 654399 is 993456.

It is not a de Polignac number, because 654399 - 2¹ = 654397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654397) 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, 1104 + ... + 1589.

It is an arithmetic number, because the mean of its divisors is an integer number (81718).

2⁶⁵⁴³⁹⁹ is an apocalyptic number.

654399 is a deficient number, since it is larger than the sum of its proper divisors (326217).

654399 is an equidigital number, since it uses as much as digits as its factorization.

654399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2708 (or 2696 counting only the distinct ones).

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

The square root of 654399 is about 808.9493185608. The cubic root of 654399 is about 86.8188860064.

The spelling of 654399 in words is "six hundred fifty-four thousand, three hundred ninety-nine".