108139530691 has 2 divisors, whose sum is σ = 108139530692. Its totient is φ = 108139530690.

The previous prime is 108139530679. The next prime is 108139530757. The reversal of 108139530691 is 196035931801.

It is a weak prime.

It is an emirp because it is prime and its reverse (196035931801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108139530691 - 2²⁹ = 107602659779 is a prime.

It is not a weakly prime, because it can be changed into another prime (108139530601) 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, 54069765345 + 54069765346.

It is an arithmetic number, because the mean of its divisors is an integer number (54069765346).

Almost surely, 2^108139530691 is an apocalyptic number.

108139530691 is a deficient number, since it is larger than the sum of its proper divisors (1).

108139530691 is an equidigital number, since it uses as much as digits as its factorization.

108139530691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 46.

The spelling of 108139530691 in words is "one hundred eight billion, one hundred thirty-nine million, five hundred thirty thousand, six hundred ninety-one".