656327009 has 8 divisors (see below), whose sum is σ = 729614592. Its totient is φ = 586296720.

The previous prime is 656326967. The next prime is 656327069. The reversal of 656327009 is 900723656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 656327009 - 2²⁰ = 655278433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (656327069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813899 + ... + 814704.

It is an arithmetic number, because the mean of its divisors is an integer number (91201824).

Almost surely, 2^656327009 is an apocalyptic number.

It is an amenable number.

656327009 is a deficient number, since it is larger than the sum of its proper divisors (73287583).

656327009 is a wasteful number, since it uses less digits than its factorization.

656327009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628647.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 656327009 is about 25618.8799325810. The cubic root of 656327009 is about 869.0406516808.

The spelling of 656327009 in words is "six hundred fifty-six million, three hundred twenty-seven thousand, nine".