120709989 has 6 divisors (see below), whose sum is σ = 174358886. Its totient is φ = 80473320.

The previous prime is 120709961. The next prime is 120709997. The reversal of 120709989 is 989907021.

It can be written as a sum of positive squares in only one way, i.e., 61496964 + 59213025 = 7842^2 + 7695^2 .

It is not a de Polignac number, because 120709989 - 2⁸ = 120709733 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 (120709889) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6706102 + ... + 6706119.

Almost surely, 2^120709989 is an apocalyptic number.

It is an amenable number.

120709989 is a deficient number, since it is larger than the sum of its proper divisors (53648897).

120709989 is a wasteful number, since it uses less digits than its factorization.

120709989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13412227 (or 13412224 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 120709989 is about 10986.8097735421. The cubic root of 120709989 is about 494.2132712415.

The spelling of 120709989 in words is "one hundred twenty million, seven hundred nine thousand, nine hundred eighty-nine".