654380865 has 12 divisors (see below), whose sum is σ = 1134260244. Its totient is φ = 349003104.

The previous prime is 654380849. The next prime is 654380873. The reversal of 654380865 is 568083456.

It can be written as a sum of positive squares in 2 ways, for example, as 147185424 + 507195441 = 12132^2 + 22521^2 .

It is not a de Polignac number, because 654380865 - 2⁴ = 654380849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 14541797 = 654380865 / (6 + 5 + 4 + 3 + 8 + 0 + 8 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 654380865.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7270854 + ... + 7270943.

It is an arithmetic number, because the mean of its divisors is an integer number (94521687).

Almost surely, 2^654380865 is an apocalyptic number.

It is an amenable number.

654380865 is a deficient number, since it is larger than the sum of its proper divisors (479879379).

654380865 is a wasteful number, since it uses less digits than its factorization.

654380865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14541808 (or 14541805 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The square root of 654380865 is about 25580.8691212789. The cubic root of 654380865 is about 868.1808401091.

The spelling of 654380865 in words is "six hundred fifty-four million, three hundred eighty thousand, eight hundred sixty-five".