121606653 has 8 divisors (see below), whose sum is σ = 185305408. Its totient is φ = 69489504.

The previous prime is 121606649. The next prime is 121606687. The reversal of 121606653 is 356606121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121606653 - 2² = 121606649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121606653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121606633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2895376 + ... + 2895417.

It is an arithmetic number, because the mean of its divisors is an integer number (23163176).

Almost surely, 2^121606653 is an apocalyptic number.

It is an amenable number.

121606653 is a deficient number, since it is larger than the sum of its proper divisors (63698755).

121606653 is an equidigital number, since it uses as much as digits as its factorization.

121606653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5790803.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 121606653 is about 11027.5406596394. The cubic root of 121606653 is about 495.4339669452.

The spelling of 121606653 in words is "one hundred twenty-one million, six hundred six thousand, six hundred fifty-three".