67140869 has 2 divisors, whose sum is σ = 67140870. Its totient is φ = 67140868.

The previous prime is 67140817. The next prime is 67140883. The reversal of 67140869 is 96804176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62884900 + 4255969 = 7930^2 + 2063^2 .

It is a cyclic number.

It is not a de Polignac number, because 67140869 - 2⁸ = 67140613 is a prime.

It is a super-4 number, since 4×67140869⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67140569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33570434 + 33570435.

It is an arithmetic number, because the mean of its divisors is an integer number (33570435).

Almost surely, 2^67140869 is an apocalyptic number.

It is an amenable number.

67140869 is a deficient number, since it is larger than the sum of its proper divisors (1).

67140869 is an equidigital number, since it uses as much as digits as its factorization.

67140869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 67140869 is about 8193.9531973279. The cubic root of 67140869 is about 406.4392606434.

The spelling of 67140869 in words is "sixty-seven million, one hundred forty thousand, eight hundred sixty-nine".