121987938 has 8 divisors (see below), whose sum is σ = 243975888. Its totient is φ = 40662644.

The previous prime is 121987933. The next prime is 121987967. The reversal of 121987938 is 839789121.

It is a sphenic number, since it is the product of 3 distinct primes.

121987938 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (121987933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10165656 + ... + 10165667.

It is an arithmetic number, because the mean of its divisors is an integer number (30496986).

Almost surely, 2^121987938 is an apocalyptic number.

121987938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121987938 is a wasteful number, since it uses less digits than its factorization.

121987938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20331328.

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

The square root of 121987938 is about 11044.8149826061. The cubic root of 121987938 is about 495.9512205975.

The spelling of 121987938 in words is "one hundred twenty-one million, nine hundred eighty-seven thousand, nine hundred thirty-eight".