120409789 has 4 divisors (see below), whose sum is σ = 120696220. Its totient is φ = 120123360.

The previous prime is 120409771. The next prime is 120409813. The reversal of 120409789 is 987904021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987904021 = 13 ⋅75992617.

It can be written as a sum of positive squares in 2 ways, for example, as 45292900 + 75116889 = 6730^2 + 8667^2 .

It is a cyclic number.

It is not a de Polignac number, because 120409789 - 2⁹ = 120409277 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 (120409489) 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, 142584 + ... + 143425.

It is an arithmetic number, because the mean of its divisors is an integer number (30174055).

Almost surely, 2^120409789 is an apocalyptic number.

It is an amenable number.

120409789 is a deficient number, since it is larger than the sum of its proper divisors (286431).

120409789 is an equidigital number, since it uses as much as digits as its factorization.

120409789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286430.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 120409789 is about 10973.1394322682. The cubic root of 120409789 is about 493.8032361762.

The spelling of 120409789 in words is "one hundred twenty million, four hundred nine thousand, seven hundred eighty-nine".