126786197 has 2 divisors, whose sum is σ = 126786198. Its totient is φ = 126786196.

The previous prime is 126786133. The next prime is 126786203. The reversal of 126786197 is 791687621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99181681 + 27604516 = 9959^2 + 5254^2 .

It is an emirp because it is prime and its reverse (791687621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126786197 - 2⁶ = 126786133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126782197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63393098 + 63393099.

It is an arithmetic number, because the mean of its divisors is an integer number (63393099).

Almost surely, 2^126786197 is an apocalyptic number.

It is an amenable number.

126786197 is a deficient number, since it is larger than the sum of its proper divisors (1).

126786197 is an equidigital number, since it uses as much as digits as its factorization.

126786197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 47.

The square root of 126786197 is about 11259.9376996500. The cubic root of 126786197 is about 502.3703412080.

The spelling of 126786197 in words is "one hundred twenty-six million, seven hundred eighty-six thousand, one hundred ninety-seven".