121983988 has 24 divisors (see below), whose sum is σ = 249161472. Its totient is φ = 51165984.

The previous prime is 121983943. The next prime is 121983989. The reversal of 121983988 is 889389121.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121983989) 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, 45031 + ... + 47662.

It is an arithmetic number, because the mean of its divisors is an integer number (10381728).

Almost surely, 2^121983988 is an apocalyptic number.

It is an amenable number.

121983988 is an abundant number, since it is smaller than the sum of its proper divisors (127177484).

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

121983988 is a wasteful number, since it uses less digits than its factorization.

121983988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92751 (or 92749 counting only the distinct ones).

The product of its digits is 248832, while the sum is 49.

The square root of 121983988 is about 11044.6361642202. The cubic root of 121983988 is about 495.9458675314.

The spelling of 121983988 in words is "one hundred twenty-one million, nine hundred eighty-three thousand, nine hundred eighty-eight".