833897921 has 2 divisors, whose sum is σ = 833897922. Its totient is φ = 833897920.

The previous prime is 833897903. The next prime is 833897947. The reversal of 833897921 is 129798338.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 785400625 + 48497296 = 28025^2 + 6964^2 .

It is a cyclic number.

It is not a de Polignac number, because 833897921 - 2¹⁰ = 833896897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 833897921.

It is not a weakly prime, because it can be changed into another prime (833897321) 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, 416948960 + 416948961.

It is an arithmetic number, because the mean of its divisors is an integer number (416948961).

Almost surely, 2^833897921 is an apocalyptic number.

It is an amenable number.

833897921 is a deficient number, since it is larger than the sum of its proper divisors (1).

833897921 is an equidigital number, since it uses as much as digits as its factorization.

833897921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 833897921 is about 28877.2907489605. The cubic root of 833897921 is about 941.2484998392.

The spelling of 833897921 in words is "eight hundred thirty-three million, eight hundred ninety-seven thousand, nine hundred twenty-one".