128234633 has 2 divisors, whose sum is σ = 128234634. Its totient is φ = 128234632.

The previous prime is 128234599. The next prime is 128234641. The reversal of 128234633 is 336432821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90878089 + 37356544 = 9533^2 + 6112^2 .

It is an emirp because it is prime and its reverse (336432821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128234633 - 2¹² = 128230537 is a prime.

It is a super-2 number, since 2×128234633² = 32888242201289378, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

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 128234633.

It is not a weakly prime, because it can be changed into another prime (128234653) 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, 64117316 + 64117317.

It is an arithmetic number, because the mean of its divisors is an integer number (64117317).

Almost surely, 2^128234633 is an apocalyptic number.

It is an amenable number.

128234633 is a deficient number, since it is larger than the sum of its proper divisors (1).

128234633 is an equidigital number, since it uses as much as digits as its factorization.

128234633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 32.

The square root of 128234633 is about 11324.0731629569. The cubic root of 128234633 is about 504.2761685093.

The spelling of 128234633 in words is "one hundred twenty-eight million, two hundred thirty-four thousand, six hundred thirty-three".