121664633 has 2 divisors, whose sum is σ = 121664634. Its totient is φ = 121664632.

The previous prime is 121664591. The next prime is 121664651. The reversal of 121664633 is 336466121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69939769 + 51724864 = 8363^2 + 7192^2 .

It is a cyclic number.

It is not a de Polignac number, because 121664633 - 2⁸ = 121664377 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121664633.

It is not a weakly prime, because it can be changed into another prime (121664663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60832316 + 60832317.

It is an arithmetic number, because the mean of its divisors is an integer number (60832317).

Almost surely, 2^121664633 is an apocalyptic number.

It is an amenable number.

121664633 is a deficient number, since it is larger than the sum of its proper divisors (1).

121664633 is an equidigital number, since it uses as much as digits as its factorization.

121664633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 32.

The square root of 121664633 is about 11030.1692190102. The cubic root of 121664633 is about 495.5126926197.

The spelling of 121664633 in words is "one hundred twenty-one million, six hundred sixty-four thousand, six hundred thirty-three".