121984689 has 16 divisors (see below), whose sum is σ = 167796800. Its totient is φ = 78788160.

The previous prime is 121984657. The next prime is 121984691. The reversal of 121984689 is 986489121.

It is not a de Polignac number, because 121984689 - 2⁵ = 121984657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121984699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7287 + ... + 17235.

It is an arithmetic number, because the mean of its divisors is an integer number (10487300).

Almost surely, 2^121984689 is an apocalyptic number.

It is an amenable number.

121984689 is a deficient number, since it is larger than the sum of its proper divisors (45812111).

121984689 is an equidigital number, since it uses as much as digits as its factorization.

121984689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10080.

The product of its digits is 248832, while the sum is 48.

The square root of 121984689 is about 11044.6678990362. The cubic root of 121984689 is about 495.9468175397.

The spelling of 121984689 in words is "one hundred twenty-one million, nine hundred eighty-four thousand, six hundred eighty-nine".