121928443 has 8 divisors (see below), whose sum is σ = 150065888. Its totient is φ = 96470784.

The previous prime is 121928399. The next prime is 121928449. The reversal of 121928443 is 344829121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121928443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121928399 and 121928408.

It is not an unprimeable number, because it can be changed into a prime (121928449) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 669846 + ... + 670027.

It is an arithmetic number, because the mean of its divisors is an integer number (18758236).

Almost surely, 2^121928443 is an apocalyptic number.

121928443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121928443 is a deficient number, since it is larger than the sum of its proper divisors (28137445).

121928443 is a wasteful number, since it uses less digits than its factorization.

121928443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339893.

The product of its digits is 13824, while the sum is 34.

The square root of 121928443 is about 11042.1213088790. The cubic root of 121928443 is about 495.8705803403.

The spelling of 121928443 in words is "one hundred twenty-one million, nine hundred twenty-eight thousand, four hundred forty-three".