126989932879687 has 2 divisors, whose sum is σ = 126989932879688. Its totient is φ = 126989932879686.

The previous prime is 126989932879651. The next prime is 126989932879757. The reversal of 126989932879687 is 786978239989621.

It is a weak prime.

It is an emirp because it is prime and its reverse (786978239989621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126989932879687 - 2¹⁵ = 126989932846919 is a prime.

It is a super-2 number, since 2×126989932879687² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126989932879595 and 126989932879604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126989932879987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63494966439843 + 63494966439844.

It is an arithmetic number, because the mean of its divisors is an integer number (63494966439844).

Almost surely, 2^{126989932879687} is an apocalyptic number.

126989932879687 is a deficient number, since it is larger than the sum of its proper divisors (1).

126989932879687 is an equidigital number, since it uses as much as digits as its factorization.

126989932879687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71108222976, while the sum is 94.

The spelling of 126989932879687 in words is "one hundred twenty-six trillion, nine hundred eighty-nine billion, nine hundred thirty-two million, eight hundred seventy-nine thousand, six hundred eighty-seven".