121783804 has 12 divisors (see below), whose sum is σ = 222387984. Its totient is φ = 58244384.

The previous prime is 121783799. The next prime is 121783843. The reversal of 121783804 is 408387121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121783804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661777 + ... + 661960.

It is an arithmetic number, because the mean of its divisors is an integer number (18532332).

Almost surely, 2^121783804 is an apocalyptic number.

It is an amenable number.

121783804 is a deficient number, since it is larger than the sum of its proper divisors (100604180).

121783804 is a wasteful number, since it uses less digits than its factorization.

121783804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323764 (or 1323762 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 121783804 is about 11035.5699445022. The cubic root of 121783804 is about 495.6744253873.

The spelling of 121783804 in words is "one hundred twenty-one million, seven hundred eighty-three thousand, eight hundred four".