121789389 has 8 divisors (see below), whose sum is σ = 165449952. Its totient is φ = 79660880.

The previous prime is 121789387. The next prime is 121789399. The reversal of 121789389 is 983987121.

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 121789389 - 2¹ = 121789387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121789387) 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, 382827 + ... + 383144.

It is an arithmetic number, because the mean of its divisors is an integer number (20681244).

Almost surely, 2^121789389 is an apocalyptic number.

It is an amenable number.

121789389 is a deficient number, since it is larger than the sum of its proper divisors (43660563).

121789389 is an equidigital number, since it uses as much as digits as its factorization.

121789389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766027.

The product of its digits is 217728, while the sum is 48.

The square root of 121789389 is about 11035.8229869820. The cubic root of 121789389 is about 495.6820024741.

The spelling of 121789389 in words is "one hundred twenty-one million, seven hundred eighty-nine thousand, three hundred eighty-nine".