121822789 has 8 divisors (see below), whose sum is σ = 138676032. Its totient is φ = 105932640.

The previous prime is 121822781. The next prime is 121822793. The reversal of 121822789 is 987228121.

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

It is not a de Polignac number, because 121822789 - 2³ = 121822781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121822781) 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, 240504 + ... + 241009.

It is an arithmetic number, because the mean of its divisors is an integer number (17334504).

Almost surely, 2^121822789 is an apocalyptic number.

It is an amenable number.

121822789 is a deficient number, since it is larger than the sum of its proper divisors (16853243).

121822789 is a wasteful number, since it uses less digits than its factorization.

121822789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481547.

The product of its digits is 32256, while the sum is 40.

The square root of 121822789 is about 11037.3361369490. The cubic root of 121822789 is about 495.7273109250.

The spelling of 121822789 in words is "one hundred twenty-one million, eight hundred twenty-two thousand, seven hundred eighty-nine".