126680069 has 2 divisors, whose sum is σ = 126680070. Its totient is φ = 126680068.

The previous prime is 126680027. The next prime is 126680077. The reversal of 126680069 is 960086621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118048225 + 8631844 = 10865^2 + 2938^2 .

It is a cyclic number.

It is not a de Polignac number, because 126680069 - 2¹⁶ = 126614533 is a prime.

It is a super-2 number, since 2×126680069² = 32095679763689522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126680089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63340034 + 63340035.

It is an arithmetic number, because the mean of its divisors is an integer number (63340035).

Almost surely, 2^126680069 is an apocalyptic number.

It is an amenable number.

126680069 is a deficient number, since it is larger than the sum of its proper divisors (1).

126680069 is an equidigital number, since it uses as much as digits as its factorization.

126680069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 126680069 is about 11255.2240759569. The cubic root of 126680069 is about 502.2301302495.

The spelling of 126680069 in words is "one hundred twenty-six million, six hundred eighty thousand, sixty-nine".