120989645 has 8 divisors (see below), whose sum is σ = 165928704. Its totient is φ = 82964304.

The previous prime is 120989641. The next prime is 120989669. The reversal of 120989645 is 546989021.

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 120989645 - 2² = 120989641 is a prime.

It is a super-3 number, since 3×120989645³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120989596 and 120989605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120989641) 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, 1728389 + ... + 1728458.

It is an arithmetic number, because the mean of its divisors is an integer number (20741088).

Almost surely, 2^120989645 is an apocalyptic number.

It is an amenable number.

120989645 is a deficient number, since it is larger than the sum of its proper divisors (44939059).

120989645 is an equidigital number, since it uses as much as digits as its factorization.

120989645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3456859.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 120989645 is about 10999.5293081113. The cubic root of 120989645 is about 494.5946346288.

The spelling of 120989645 in words is "one hundred twenty million, nine hundred eighty-nine thousand, six hundred forty-five".