654143065 has 4 divisors (see below), whose sum is σ = 784971684. Its totient is φ = 523314448.

The previous prime is 654143041. The next prime is 654143099. The reversal of 654143065 is 560341456.

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

It can be written as a sum of positive squares in 2 ways, for example, as 482768784 + 171374281 = 21972^2 + 13091^2 .

It is a cyclic number.

It is not a de Polignac number, because 654143065 - 2⁹ = 654142553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 654143065.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65414302 + ... + 65414311.

It is an arithmetic number, because the mean of its divisors is an integer number (196242921).

Almost surely, 2^654143065 is an apocalyptic number.

It is an amenable number.

654143065 is a deficient number, since it is larger than the sum of its proper divisors (130828619).

654143065 is a wasteful number, since it uses less digits than its factorization.

654143065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130828618.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 654143065 is about 25576.2206942308. The cubic root of 654143065 is about 868.0756626159.

The spelling of 654143065 in words is "six hundred fifty-four million, one hundred forty-three thousand, sixty-five".