121979804 has 6 divisors (see below), whose sum is σ = 213464664. Its totient is φ = 60989900.

The previous prime is 121979783. The next prime is 121979807. The reversal of 121979804 is 408979121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121979807) 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 as a sum of consecutive naturals, namely, 15247472 + ... + 15247479.

It is an arithmetic number, because the mean of its divisors is an integer number (35577444).

Almost surely, 2^121979804 is an apocalyptic number.

It is an amenable number.

121979804 is a deficient number, since it is larger than the sum of its proper divisors (91484860).

121979804 is a wasteful number, since it uses less digits than its factorization.

121979804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30494955 (or 30494953 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 121979804 is about 11044.4467493850. The cubic root of 121979804 is about 495.9401972210.

The spelling of 121979804 in words is "one hundred twenty-one million, nine hundred seventy-nine thousand, eight hundred four".