7271087689 has 2 divisors, whose sum is σ = 7271087690. Its totient is φ = 7271087688.

The previous prime is 7271087639. The next prime is 7271087753. The reversal of 7271087689 is 9867801727.

It is a happy number.

7271087689 is digitally balanced in base 3, 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., 5789992464 + 1481095225 = 76092^2 + 38485^2 .

It is a cyclic number.

It is not a de Polignac number, because 7271087689 - 2¹¹ = 7271085641 is a prime.

It is a super-2 number, since 2×7271087689² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7271087639) 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, 3635543844 + 3635543845.

It is an arithmetic number, because the mean of its divisors is an integer number (3635543845).

Almost surely, 2^7271087689 is an apocalyptic number.

It is an amenable number.

7271087689 is a deficient number, since it is larger than the sum of its proper divisors (1).

7271087689 is an equidigital number, since it uses as much as digits as its factorization.

7271087689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2370816, while the sum is 55.

The square root of 7271087689 is about 85270.6730887003. The cubic root of 7271087689 is about 1937.3130060198.

The spelling of 7271087689 in words is "seven billion, two hundred seventy-one million, eighty-seven thousand, six hundred eighty-nine".