2140086721 has 2 divisors, whose sum is σ = 2140086722. Its totient is φ = 2140086720.

The previous prime is 2140086713. The next prime is 2140086863. The reversal of 2140086721 is 1276800412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1233414400 + 906672321 = 35120^2 + 30111^2 .

It is a cyclic number.

It is not a de Polignac number, because 2140086721 - 2³ = 2140086713 is a prime.

It is not a weakly prime, because it can be changed into another prime (2140086121) 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, 1070043360 + 1070043361.

It is an arithmetic number, because the mean of its divisors is an integer number (1070043361).

Almost surely, 2^2140086721 is an apocalyptic number.

It is an amenable number.

2140086721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2140086721 is an equidigital number, since it uses as much as digits as its factorization.

2140086721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 2140086721 is about 46261.0713343303. The cubic root of 2140086721 is about 1288.6761494370.

The spelling of 2140086721 in words is "two billion, one hundred forty million, eighty-six thousand, seven hundred twenty-one".