120656009 has 4 divisors (see below), whose sum is σ = 120738000. Its totient is φ = 120574020.

The previous prime is 120655993. The next prime is 120656027. The reversal of 120656009 is 900656021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120656009 - 2⁴ = 120655993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120656059) 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, 38747 + ... + 41744.

It is an arithmetic number, because the mean of its divisors is an integer number (30184500).

Almost surely, 2^120656009 is an apocalyptic number.

It is an amenable number.

120656009 is a deficient number, since it is larger than the sum of its proper divisors (81991).

120656009 is an equidigital number, since it uses as much as digits as its factorization.

120656009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81990.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 120656009 is about 10984.3529167630. The cubic root of 120656009 is about 494.1395915894.

The spelling of 120656009 in words is "one hundred twenty million, six hundred fifty-six thousand, nine".