121617984 has 28 divisors (see below), whose sum is σ = 321781424. Its totient is φ = 40539264.

The previous prime is 121617961. The next prime is 121617989. The reversal of 121617984 is 489716121.

It is not an unprimeable number, because it can be changed into a prime (121617989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316522 + ... + 316905.

Almost surely, 2^121617984 is an apocalyptic number.

It is an amenable number.

121617984 is an abundant number, since it is smaller than the sum of its proper divisors (200163440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121617984 is an equidigital number, since it uses as much as digits as its factorization.

121617984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633442 (or 633432 counting only the distinct ones).

The product of its digits is 24192, while the sum is 39.

The square root of 121617984 is about 11028.0544068299. The cubic root of 121617984 is about 495.4493542281.

The spelling of 121617984 in words is "one hundred twenty-one million, six hundred seventeen thousand, nine hundred eighty-four".