833720081 has 2 divisors, whose sum is σ = 833720082. Its totient is φ = 833720080.

The previous prime is 833720021. The next prime is 833720087. The reversal of 833720081 is 180027338.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 532871056 + 300849025 = 23084^2 + 17345^2 .

It is a cyclic number.

It is not a de Polignac number, because 833720081 - 2¹⁴ = 833703697 is a prime.

It is a super-2 number, since 2×833720081² = 1390178346925293122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (833720087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416860040 + 416860041.

It is an arithmetic number, because the mean of its divisors is an integer number (416860041).

Almost surely, 2^833720081 is an apocalyptic number.

It is an amenable number.

833720081 is a deficient number, since it is larger than the sum of its proper divisors (1).

833720081 is an equidigital number, since it uses as much as digits as its factorization.

833720081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 833720081 is about 28874.2113485373. The cubic root of 833720081 is about 941.1815837615.

The spelling of 833720081 in words is "eight hundred thirty-three million, seven hundred twenty thousand, eighty-one".