67140817 has 2 divisors, whose sum is σ = 67140818. Its totient is φ = 67140816.

The previous prime is 67140811. The next prime is 67140869. The reversal of 67140817 is 71804176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66569281 + 571536 = 8159^2 + 756^2 .

It is a cyclic number.

It is not a de Polignac number, because 67140817 - 2¹¹ = 67138769 is a prime.

It is not a weakly prime, because it can be changed into another prime (67140811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33570408 + 33570409.

It is an arithmetic number, because the mean of its divisors is an integer number (33570409).

Almost surely, 2^67140817 is an apocalyptic number.

It is an amenable number.

67140817 is a deficient number, since it is larger than the sum of its proper divisors (1).

67140817 is an equidigital number, since it uses as much as digits as its factorization.

67140817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 67140817 is about 8193.9500242557. The cubic root of 67140817 is about 406.4391557155.

The spelling of 67140817 in words is "sixty-seven million, one hundred forty thousand, eight hundred seventeen".