126726709 has 2 divisors, whose sum is σ = 126726710. Its totient is φ = 126726708.

The previous prime is 126726703. The next prime is 126726727. The reversal of 126726709 is 907627621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98604900 + 28121809 = 9930^2 + 5303^2 .

It is a cyclic number.

It is not a de Polignac number, because 126726709 - 2⁷ = 126726581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126726703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63363354 + 63363355.

It is an arithmetic number, because the mean of its divisors is an integer number (63363355).

Almost surely, 2^126726709 is an apocalyptic number.

It is an amenable number.

126726709 is a deficient number, since it is larger than the sum of its proper divisors (1).

126726709 is an equidigital number, since it uses as much as digits as its factorization.

126726709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 126726709 is about 11257.2958120501. The cubic root of 126726709 is about 502.2917583055.

The spelling of 126726709 in words is "one hundred twenty-six million, seven hundred twenty-six thousand, seven hundred nine".