830720881 has 2 divisors, whose sum is σ = 830720882. Its totient is φ = 830720880.

The previous prime is 830720879. The next prime is 830720893. The reversal of 830720881 is 188027038.

830720881 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., 774230625 + 56490256 = 27825^2 + 7516^2 .

It is a cyclic number.

It is not a de Polignac number, because 830720881 - 2¹ = 830720879 is a prime.

It is a super-2 number, since 2×830720881² = 1380194364258832322, which contains 22 as substring.

Together with 830720879, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 830720881.

It is not a weakly prime, because it can be changed into another prime (830720381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415360440 + 415360441.

It is an arithmetic number, because the mean of its divisors is an integer number (415360441).

Almost surely, 2^830720881 is an apocalyptic number.

It is an amenable number.

830720881 is a deficient number, since it is larger than the sum of its proper divisors (1).

830720881 is an equidigital number, since it uses as much as digits as its factorization.

830720881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 830720881 is about 28822.2289387896. The cubic root of 830720881 is about 940.0516347824.

The spelling of 830720881 in words is "eight hundred thirty million, seven hundred twenty thousand, eight hundred eighty-one".