126196909 has 2 divisors, whose sum is σ = 126196910. Its totient is φ = 126196908.

The previous prime is 126196897. The next prime is 126196919. The reversal of 126196909 is 909691621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122877225 + 3319684 = 11085^2 + 1822^2 .

It is a cyclic number.

It is not a de Polignac number, because 126196909 - 2⁷ = 126196781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126196919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63098454 + 63098455.

It is an arithmetic number, because the mean of its divisors is an integer number (63098455).

Almost surely, 2^126196909 is an apocalyptic number.

It is an amenable number.

126196909 is a deficient number, since it is larger than the sum of its proper divisors (1).

126196909 is an equidigital number, since it uses as much as digits as its factorization.

126196909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 126196909 is about 11233.7397602045. The cubic root of 126196909 is about 501.5908119337.

The spelling of 126196909 in words is "one hundred twenty-six million, one hundred ninety-six thousand, nine hundred nine".