121628653 has 4 divisors (see below), whose sum is σ = 122557248. Its totient is φ = 120700060.

The previous prime is 121628641. The next prime is 121628699. The reversal of 121628653 is 356826121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121628653 - 2⁹ = 121628141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121628053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464101 + ... + 464362.

It is an arithmetic number, because the mean of its divisors is an integer number (30639312).

Almost surely, 2^121628653 is an apocalyptic number.

It is an amenable number.

121628653 is a deficient number, since it is larger than the sum of its proper divisors (928595).

121628653 is an equidigital number, since it uses as much as digits as its factorization.

121628653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928594.

The product of its digits is 17280, while the sum is 34.

The square root of 121628653 is about 11028.5381170851. The cubic root of 121628653 is about 495.4638416540.

The spelling of 121628653 in words is "one hundred twenty-one million, six hundred twenty-eight thousand, six hundred fifty-three".