654643567 has 4 divisors (see below), whose sum is σ = 669867880. Its totient is φ = 639419256.

The previous prime is 654643559. The next prime is 654643573. The reversal of 654643567 is 765346456.

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 654643567 - 2³ = 654643559 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 (654643547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7612092 + ... + 7612177.

It is an arithmetic number, because the mean of its divisors is an integer number (167466970).

Almost surely, 2^654643567 is an apocalyptic number.

654643567 is a deficient number, since it is larger than the sum of its proper divisors (15224313).

654643567 is a wasteful number, since it uses less digits than its factorization.

654643567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15224312.

The product of its digits is 1814400, while the sum is 46.

The square root of 654643567 is about 25586.0033416710. The cubic root of 654643567 is about 868.2970019867.

The spelling of 654643567 in words is "six hundred fifty-four million, six hundred forty-three thousand, five hundred sixty-seven".