8207091389 has 12 divisors (see below), whose sum is σ = 9553787100. Its totient is φ = 7029667008.

The previous prime is 8207091359. The next prime is 8207091457. The reversal of 8207091389 is 9831907028.

It can be written as a sum of positive squares in 2 ways, for example, as 733488889 + 7473602500 = 27083^2 + 86450^2 .

It is not a de Polignac number, because 8207091389 - 2⁸ = 8207091133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8207091349) 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 11 ways as a sum of consecutive naturals, for example, 11417 + ... + 128625.

It is an arithmetic number, because the mean of its divisors is an integer number (796148925).

Almost surely, 2^8207091389 is an apocalyptic number.

It is an amenable number.

8207091389 is a deficient number, since it is larger than the sum of its proper divisors (1346695711).

8207091389 is a wasteful number, since it uses less digits than its factorization.

8207091389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118652 (or 118645 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 8207091389 is about 90592.9985650105. The cubic root of 8207091389 is about 2017.1108083932.

The spelling of 8207091389 in words is "eight billion, two hundred seven million, ninety-one thousand, three hundred eighty-nine".