121889306 has 16 divisors (see below), whose sum is σ = 227949120. Its totient is φ = 47489280.

The previous prime is 121889279. The next prime is 121889309. The reversal of 121889306 is 603988121.

It is a self number, because there is not a number n which added to its sum of digits gives 121889306.

It is not an unprimeable number, because it can be changed into a prime (121889309) 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 7 ways as a sum of consecutive naturals, for example, 395591 + ... + 395898.

It is an arithmetic number, because the mean of its divisors is an integer number (14246820).

Almost surely, 2^121889306 is an apocalyptic number.

121889306 is a deficient number, since it is larger than the sum of its proper divisors (106059814).

121889306 is a wasteful number, since it uses less digits than its factorization.

121889306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791509.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 121889306 is about 11040.3489981069. The cubic root of 121889306 is about 495.8175192628.

The spelling of 121889306 in words is "one hundred twenty-one million, eight hundred eighty-nine thousand, three hundred six".