121549688 has 64 divisors (see below), whose sum is σ = 260820000. Its totient is φ = 52641792.

The previous prime is 121549651. The next prime is 121549717. The reversal of 121549688 is 886945121.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270488 + ... + 270936.

Almost surely, 2^121549688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121549688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130410000).

121549688 is an abundant number, since it is smaller than the sum of its proper divisors (139270312).

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

121549688 is a wasteful number, since it uses less digits than its factorization.

121549688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 620 counting only the distinct ones).

The product of its digits is 138240, while the sum is 44.

The square root of 121549688 is about 11024.9575055870. The cubic root of 121549688 is about 495.3565950712.

The spelling of 121549688 in words is "one hundred twenty-one million, five hundred forty-nine thousand, six hundred eighty-eight".