108877091809 has 2 divisors, whose sum is σ = 108877091810. Its totient is φ = 108877091808.

The previous prime is 108877091797. The next prime is 108877091837. The reversal of 108877091809 is 908190778801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98335552225 + 10541539584 = 313585^2 + 102672^2 .

It is an emirp because it is prime and its reverse (908190778801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108877091809 - 2⁷ = 108877091681 is a prime.

It is a super-2 number, since 2×108877091809² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (108877091849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54438545904 + 54438545905.

It is an arithmetic number, because the mean of its divisors is an integer number (54438545905).

Almost surely, 2^108877091809 is an apocalyptic number.

It is an amenable number.

108877091809 is a deficient number, since it is larger than the sum of its proper divisors (1).

108877091809 is an equidigital number, since it uses as much as digits as its factorization.

108877091809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 58.

The spelling of 108877091809 in words is "one hundred eight billion, eight hundred seventy-seven million, ninety-one thousand, eight hundred nine".