990733193 has 2 divisors, whose sum is σ = 990733194. Its totient is φ = 990733192.

The previous prime is 990733189. The next prime is 990733199. The reversal of 990733193 is 391337099.

It is a happy number.

990733193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 533286649 + 457446544 = 23093^2 + 21388^2 .

It is an emirp because it is prime and its reverse (391337099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990733193 - 2² = 990733189 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (990733199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495366596 + 495366597.

It is an arithmetic number, because the mean of its divisors is an integer number (495366597).

Almost surely, 2^990733193 is an apocalyptic number.

It is an amenable number.

990733193 is a deficient number, since it is larger than the sum of its proper divisors (1).

990733193 is an equidigital number, since it uses as much as digits as its factorization.

990733193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137781, while the sum is 44.

The square root of 990733193 is about 31475.9144902892. The cubic root of 990733193 is about 996.9014733823.

The spelling of 990733193 in words is "nine hundred ninety million, seven hundred thirty-three thousand, one hundred ninety-three".