121867873 has 4 divisors (see below), whose sum is σ = 121889988. Its totient is φ = 121845760.

The previous prime is 121867871. The next prime is 121867877. The reversal of 121867873 is 378768121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 70358544 + 51509329 = 8388^2 + 7177^2 .

It is a cyclic number.

It is not a de Polignac number, because 121867873 - 2¹ = 121867871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121867871) 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 3 ways as a sum of consecutive naturals, for example, 4593 + ... + 16273.

It is an arithmetic number, because the mean of its divisors is an integer number (30472497).

Almost surely, 2^121867873 is an apocalyptic number.

It is an amenable number.

121867873 is a deficient number, since it is larger than the sum of its proper divisors (22115).

121867873 is a wasteful number, since it uses less digits than its factorization.

121867873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22114.

The product of its digits is 112896, while the sum is 43.

The square root of 121867873 is about 11039.3782886538. The cubic root of 121867873 is about 495.7884560628.

The spelling of 121867873 in words is "one hundred twenty-one million, eight hundred sixty-seven thousand, eight hundred seventy-three".