121653806 has 16 divisors (see below), whose sum is σ = 187675488. Its totient is φ = 59107200.

The previous prime is 121653799. The next prime is 121653823. The reversal of 121653806 is 608356121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18746 + ... + 24386.

It is an arithmetic number, because the mean of its divisors is an integer number (11729718).

Almost surely, 2^121653806 is an apocalyptic number.

121653806 is a deficient number, since it is larger than the sum of its proper divisors (66021682).

121653806 is a wasteful number, since it uses less digits than its factorization.

121653806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5947.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 121653806 is about 11029.6784177962. The cubic root of 121653806 is about 495.4979935382.

The spelling of 121653806 in words is "one hundred twenty-one million, six hundred fifty-three thousand, eight hundred six".