109109117947 has 2 divisors, whose sum is σ = 109109117948. Its totient is φ = 109109117946.

The previous prime is 109109117941. The next prime is 109109117963. The reversal of 109109117947 is 749711901901.

It is a weak prime.

It is an emirp because it is prime and its reverse (749711901901) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109109117947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109109117947.

It is not a weakly prime, because it can be changed into another prime (109109117941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54554558973 + 54554558974.

It is an arithmetic number, because the mean of its divisors is an integer number (54554558974).

Almost surely, 2^109109117947 is an apocalyptic number.

109109117947 is a deficient number, since it is larger than the sum of its proper divisors (1).

109109117947 is an equidigital number, since it uses as much as digits as its factorization.

109109117947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 49.

The spelling of 109109117947 in words is "one hundred nine billion, one hundred nine million, one hundred seventeen thousand, nine hundred forty-seven".