13918109173 has 2 divisors, whose sum is σ = 13918109174. Its totient is φ = 13918109172.

The previous prime is 13918109131. The next prime is 13918109203. The reversal of 13918109173 is 37190181931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12330325764 + 1587783409 = 111042^2 + 39847^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13918109173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13918109123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6959054586 + 6959054587.

It is an arithmetic number, because the mean of its divisors is an integer number (6959054587).

Almost surely, 2^13918109173 is an apocalyptic number.

It is an amenable number.

13918109173 is a deficient number, since it is larger than the sum of its proper divisors (1).

13918109173 is an equidigital number, since it uses as much as digits as its factorization.

13918109173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 43.

The spelling of 13918109173 in words is "thirteen billion, nine hundred eighteen million, one hundred nine thousand, one hundred seventy-three".