67125209 has 2 divisors, whose sum is σ = 67125210. Its totient is φ = 67125208.

The previous prime is 67125187. The next prime is 67125221. The reversal of 67125209 is 90252176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58859584 + 8265625 = 7672^2 + 2875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67125209 is a prime.

It is not a weakly prime, because it can be changed into another prime (67125239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33562604 + 33562605.

It is an arithmetic number, because the mean of its divisors is an integer number (33562605).

Almost surely, 2^67125209 is an apocalyptic number.

It is an amenable number.

67125209 is a deficient number, since it is larger than the sum of its proper divisors (1).

67125209 is an equidigital number, since it uses as much as digits as its factorization.

67125209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 67125209 is about 8192.9975588914. The cubic root of 67125209 is about 406.4076587600.

The spelling of 67125209 in words is "sixty-seven million, one hundred twenty-five thousand, two hundred nine".