188439726202097 has 2 divisors, whose sum is σ = 188439726202098. Its totient is φ = 188439726202096.

The previous prime is 188439726202031. The next prime is 188439726202109. The reversal of 188439726202097 is 790202627934881.

188439726202097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130864471039201 + 57575255162896 = 11439601^2 + 7587836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188439726202097 is a prime.

It is a super-2 number, since 2×188439726202097² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (188439726202997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94219863101048 + 94219863101049.

It is an arithmetic number, because the mean of its divisors is an integer number (94219863101049).

Almost surely, 2^{188439726202097} is an apocalyptic number.

It is an amenable number.

188439726202097 is a deficient number, since it is larger than the sum of its proper divisors (1).

188439726202097 is an equidigital number, since it uses as much as digits as its factorization.

188439726202097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 146313216, while the sum is 68.

The spelling of 188439726202097 in words is "one hundred eighty-eight trillion, four hundred thirty-nine billion, seven hundred twenty-six million, two hundred two thousand, ninety-seven".