121753553 has 2 divisors, whose sum is σ = 121753554. Its totient is φ = 121753552.

The previous prime is 121753549. The next prime is 121753579. The reversal of 121753553 is 355357121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114746944 + 7006609 = 10712^2 + 2647^2 .

It is a cyclic number.

It is not a de Polignac number, because 121753553 - 2² = 121753549 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121753543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60876776 + 60876777.

It is an arithmetic number, because the mean of its divisors is an integer number (60876777).

Almost surely, 2^121753553 is an apocalyptic number.

It is an amenable number.

121753553 is a deficient number, since it is larger than the sum of its proper divisors (1).

121753553 is an equidigital number, since it uses as much as digits as its factorization.

121753553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15750, while the sum is 32.

The square root of 121753553 is about 11034.1992459807. The cubic root of 121753553 is about 495.6333802777.

The spelling of 121753553 in words is "one hundred twenty-one million, seven hundred fifty-three thousand, five hundred fifty-three".