108978508813 has 2 divisors, whose sum is σ = 108978508814. Its totient is φ = 108978508812.

The previous prime is 108978508711. The next prime is 108978508843. The reversal of 108978508813 is 318805879801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87993509769 + 20984999044 = 296637^2 + 144862^2 .

It is an emirp because it is prime and its reverse (318805879801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108978508813 - 2²⁹ = 108441637901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108978508843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54489254406 + 54489254407.

It is an arithmetic number, because the mean of its divisors is an integer number (54489254407).

Almost surely, 2^108978508813 is an apocalyptic number.

It is an amenable number.

108978508813 is a deficient number, since it is larger than the sum of its proper divisors (1).

108978508813 is an equidigital number, since it uses as much as digits as its factorization.

108978508813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3870720, while the sum is 58.

The spelling of 108978508813 in words is "one hundred eight billion, nine hundred seventy-eight million, five hundred eight thousand, eight hundred thirteen".