109188813869 has 2 divisors, whose sum is σ = 109188813870. Its totient is φ = 109188813868.

The previous prime is 109188813827. The next prime is 109188813871. The reversal of 109188813869 is 968318881901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71910858244 + 37277955625 = 268162^2 + 193075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109188813869 is a prime.

It is a super-2 number, since 2×109188813869² (a number of 23 digits) contains 22 as substring.

Together with 109188813871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109188813889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54594406934 + 54594406935.

It is an arithmetic number, because the mean of its divisors is an integer number (54594406935).

Almost surely, 2^109188813869 is an apocalyptic number.

It is an amenable number.

109188813869 is a deficient number, since it is larger than the sum of its proper divisors (1).

109188813869 is an equidigital number, since it uses as much as digits as its factorization.

109188813869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5971968, while the sum is 62.

The spelling of 109188813869 in words is "one hundred nine billion, one hundred eighty-eight million, eight hundred thirteen thousand, eight hundred sixty-nine".