654860399 has 4 divisors (see below), whose sum is σ = 675984960. Its totient is φ = 633735840.

The previous prime is 654860369. The next prime is 654860407. The reversal of 654860399 is 993068456.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 654860399 - 2¹⁶ = 654794863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654860359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10562234 + ... + 10562295.

It is an arithmetic number, because the mean of its divisors is an integer number (168996240).

Almost surely, 2^654860399 is an apocalyptic number.

654860399 is a deficient number, since it is larger than the sum of its proper divisors (21124561).

654860399 is a wasteful number, since it uses less digits than its factorization.

654860399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21124560.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 654860399 is about 25590.2403075860. The cubic root of 654860399 is about 868.3928576054.

The spelling of 654860399 in words is "six hundred fifty-four million, eight hundred sixty thousand, three hundred ninety-nine".