188126887997 has 2 divisors, whose sum is σ = 188126887998. Its totient is φ = 188126887996.

The previous prime is 188126887951. The next prime is 188126888029. The reversal of 188126887997 is 799788621881.

188126887997 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., 165868038361 + 22258849636 = 407269^2 + 149194^2 .

It is a cyclic number.

It is not a de Polignac number, because 188126887997 - 2²⁴ = 188110110781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188126287997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94063443998 + 94063443999.

It is an arithmetic number, because the mean of its divisors is an integer number (94063443999).

Almost surely, 2^188126887997 is an apocalyptic number.

It is an amenable number.

188126887997 is a deficient number, since it is larger than the sum of its proper divisors (1).

188126887997 is an equidigital number, since it uses as much as digits as its factorization.

188126887997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 195084288, while the sum is 74.

The spelling of 188126887997 in words is "one hundred eighty-eight billion, one hundred twenty-six million, eight hundred eighty-seven thousand, nine hundred ninety-seven".