9687139138 has 16 divisors (see below), whose sum is σ = 15391695384. Its totient is φ = 4556805120.

The previous prime is 9687139117. The next prime is 9687139159. The reversal of 9687139138 is 8319317869.

It is an interprime number because it is at equal distance from previous prime (9687139117) and next prime (9687139159).

It can be written as a sum of positive squares in 4 ways, for example, as 9029370529 + 657768609 = 95023^2 + 25647^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29206 + ... + 142222.

Almost surely, 2^9687139138 is an apocalyptic number.

9687139138 is a deficient number, since it is larger than the sum of its proper divisors (5704556246).

9687139138 is a wasteful number, since it uses less digits than its factorization.

9687139138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115557.

The product of its digits is 1959552, while the sum is 55.

The square root of 9687139138 is about 98423.2652272825. The cubic root of 9687139138 is about 2131.7282760111.

The spelling of 9687139138 in words is "nine billion, six hundred eighty-seven million, one hundred thirty-nine thousand, one hundred thirty-eight".