833201981 has 2 divisors, whose sum is σ = 833201982. Its totient is φ = 833201980.

The previous prime is 833201921. The next prime is 833202061. The reversal of 833201981 is 189102338.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 806844025 + 26357956 = 28405^2 + 5134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-833201981 is a prime.

It is a super-2 number, since 2×833201981² = 1388451082284648722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (833201921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416600990 + 416600991.

It is an arithmetic number, because the mean of its divisors is an integer number (416600991).

Almost surely, 2^833201981 is an apocalyptic number.

It is an amenable number.

833201981 is a deficient number, since it is larger than the sum of its proper divisors (1).

833201981 is an equidigital number, since it uses as much as digits as its factorization.

833201981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 833201981 is about 28865.2382806725. The cubic root of 833201981 is about 940.9865833718.

The spelling of 833201981 in words is "eight hundred thirty-three million, two hundred one thousand, nine hundred eighty-one".