121363653 has 4 divisors (see below), whose sum is σ = 161818208. Its totient is φ = 80909100.

The previous prime is 121363643. The next prime is 121363657. The reversal of 121363653 is 356363121.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 356363121 = 3 ⋅118787707.

It is not a de Polignac number, because 121363653 - 2⁸ = 121363397 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 121363653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121363657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20227273 + ... + 20227278.

It is an arithmetic number, because the mean of its divisors is an integer number (40454552).

Almost surely, 2^121363653 is an apocalyptic number.

It is an amenable number.

121363653 is a deficient number, since it is larger than the sum of its proper divisors (40454555).

121363653 is an equidigital number, since it uses as much as digits as its factorization.

121363653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40454554.

The product of its digits is 9720, while the sum is 30.

The square root of 121363653 is about 11016.5172808833. The cubic root of 121363653 is about 495.1037472572.

The spelling of 121363653 in words is "one hundred twenty-one million, three hundred sixty-three thousand, six hundred fifty-three".