121976890 has 16 divisors (see below), whose sum is σ = 250924032. Its totient is φ = 41820624.

The previous prime is 121976863. The next prime is 121976893. The reversal of 121976890 is 98679121.

It is not an unprimeable number, because it can be changed into a prime (121976893) 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, 871194 + ... + 871333.

It is an arithmetic number, because the mean of its divisors is an integer number (15682752).

Almost surely, 2^121976890 is an apocalyptic number.

121976890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121976890 is an abundant number, since it is smaller than the sum of its proper divisors (128947142).

121976890 is a wasteful number, since it uses less digits than its factorization.

121976890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742541.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 121976890 is about 11044.3148270954. The cubic root of 121976890 is about 495.9362479846.

The spelling of 121976890 in words is "one hundred twenty-one million, nine hundred seventy-six thousand, eight hundred ninety".