8420027691 has 32 divisors (see below), whose sum is σ = 11638287360. Its totient is φ = 5411937024.

The previous prime is 8420027683. The next prime is 8420027747. The reversal of 8420027691 is 1967200248.

8420027691 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8420027691 - 2³ = 8420027683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8420027621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2849871 + ... + 2852823.

It is an arithmetic number, because the mean of its divisors is an integer number (363696480).

Almost surely, 2^8420027691 is an apocalyptic number.

8420027691 is a deficient number, since it is larger than the sum of its proper divisors (3218259669).

8420027691 is a wasteful number, since it uses less digits than its factorization.

8420027691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3315.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 8420027691 is about 91760.7088627807. The cubic root of 8420027691 is about 2034.4069926441.

The spelling of 8420027691 in words is "eight billion, four hundred twenty million, twenty-seven thousand, six hundred ninety-one".