108938478197 has 2 divisors, whose sum is σ = 108938478198. Its totient is φ = 108938478196.

The previous prime is 108938478139. The next prime is 108938478199. The reversal of 108938478197 is 791874839801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100759265476 + 8179212721 = 317426^2 + 90439^2 .

It is a cyclic number.

It is not a de Polignac number, because 108938478197 - 2¹⁰ = 108938477173 is a prime.

Together with 108938478199, 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 (108938478199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54469239098 + 54469239099.

It is an arithmetic number, because the mean of its divisors is an integer number (54469239099).

Almost surely, 2^108938478197 is an apocalyptic number.

It is an amenable number.

108938478197 is a deficient number, since it is larger than the sum of its proper divisors (1).

108938478197 is an equidigital number, since it uses as much as digits as its factorization.

108938478197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24385536, while the sum is 65.

The spelling of 108938478197 in words is "one hundred eight billion, nine hundred thirty-eight million, four hundred seventy-eight thousand, one hundred ninety-seven".