2058721009 has 2 divisors, whose sum is σ = 2058721010. Its totient is φ = 2058721008.

The previous prime is 2058721001. The next prime is 2058721013. The reversal of 2058721009 is 9001278502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2048015025 + 10705984 = 45255^2 + 3272^2 .

It is a cyclic number.

It is not a de Polignac number, because 2058721009 - 2³ = 2058721001 is a prime.

It is not a weakly prime, because it can be changed into another prime (2058721001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1029360504 + 1029360505.

It is an arithmetic number, because the mean of its divisors is an integer number (1029360505).

Almost surely, 2^2058721009 is an apocalyptic number.

It is an amenable number.

2058721009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2058721009 is an equidigital number, since it uses as much as digits as its factorization.

2058721009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 2058721009 is about 45373.1309146724. The cubic root of 2058721009 is about 1272.1329418905.

The spelling of 2058721009 in words is "two billion, fifty-eight million, seven hundred twenty-one thousand, nine".