120404909 has 4 divisors (see below), whose sum is σ = 120427740. Its totient is φ = 120382080.

The previous prime is 120404873. The next prime is 120404917. The reversal of 120404909 is 909404021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 909404021 = 107 ⋅8499103.

It can be written as a sum of positive squares in 2 ways, for example, as 109202500 + 11202409 = 10450^2 + 3347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120404909 is a prime.

It is a super-2 number, since 2×120404909² = 28994684222596562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120400909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989 + ... + 15549.

It is an arithmetic number, because the mean of its divisors is an integer number (30106935).

Almost surely, 2^120404909 is an apocalyptic number.

It is an amenable number.

120404909 is a deficient number, since it is larger than the sum of its proper divisors (22831).

120404909 is an equidigital number, since it uses as much as digits as its factorization.

120404909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22830.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 120404909 is about 10972.9170688564. The cubic root of 120404909 is about 493.7965650897.

The spelling of 120404909 in words is "one hundred twenty million, four hundred four thousand, nine hundred nine".