121683478 has 64 divisors (see below), whose sum is σ = 229340160. Its totient is φ = 47279232.

The previous prime is 121683473. The next prime is 121683509. The reversal of 121683478 is 874386121.

It is a self number, because there is not a number n which added to its sum of digits gives 121683478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121683473) 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 31 ways as a sum of consecutive naturals, for example, 774976 + ... + 775132.

It is an arithmetic number, because the mean of its divisors is an integer number (3583440).

Almost surely, 2^121683478 is an apocalyptic number.

121683478 is a deficient number, since it is larger than the sum of its proper divisors (107656682).

121683478 is a wasteful number, since it uses less digits than its factorization.

121683478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301.

The product of its digits is 64512, while the sum is 40.

The square root of 121683478 is about 11031.0234339340. The cubic root of 121683478 is about 495.5382751148.

The spelling of 121683478 in words is "one hundred twenty-one million, six hundred eighty-three thousand, four hundred seventy-eight".