2058721109 has 4 divisors (see below), whose sum is σ = 2060882316. Its totient is φ = 2056559904.

The previous prime is 2058721087. The next prime is 2058721111. The reversal of 2058721109 is 9011278502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1128288100 + 930433009 = 33590^2 + 30503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2058721109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2058721009) 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 in 3 ways as a sum of consecutive naturals, for example, 1079174 + ... + 1081079.

It is an arithmetic number, because the mean of its divisors is an integer number (515220579).

Almost surely, 2^2058721109 is an apocalyptic number.

It is an amenable number.

2058721109 is a deficient number, since it is larger than the sum of its proper divisors (2161207).

2058721109 is an equidigital number, since it uses as much as digits as its factorization.

2058721109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161206.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 2058721109 is about 45373.1320166462. The cubic root of 2058721109 is about 1272.1329624880.

The spelling of 2058721109 in words is "two billion, fifty-eight million, seven hundred twenty-one thousand, one hundred nine".