126868639 has 2 divisors, whose sum is σ = 126868640. Its totient is φ = 126868638.

The previous prime is 126868561. The next prime is 126868657. The reversal of 126868639 is 936868621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126868639 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 126868592 and 126868601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126868139) 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, 63434319 + 63434320.

It is an arithmetic number, because the mean of its divisors is an integer number (63434320).

Almost surely, 2^126868639 is an apocalyptic number.

126868639 is a deficient number, since it is larger than the sum of its proper divisors (1).

126868639 is an equidigital number, since it uses as much as digits as its factorization.

126868639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 49.

The square root of 126868639 is about 11263.5979597995. The cubic root of 126868639 is about 502.4792054298.

The spelling of 126868639 in words is "one hundred twenty-six million, eight hundred sixty-eight thousand, six hundred thirty-nine".