67081769 has 2 divisors, whose sum is σ = 67081770. Its totient is φ = 67081768.

The previous prime is 67081759. The next prime is 67081771. The reversal of 67081769 is 96718076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52027369 + 15054400 = 7213^2 + 3880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67081769 is a prime.

It is a super-2 number, since 2×67081769² = 8999927464338722, which contains 22 as substring.

Together with 67081771, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67081709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33540884 + 33540885.

It is an arithmetic number, because the mean of its divisors is an integer number (33540885).

Almost surely, 2^67081769 is an apocalyptic number.

It is an amenable number.

67081769 is a deficient number, since it is larger than the sum of its proper divisors (1).

67081769 is an equidigital number, since it uses as much as digits as its factorization.

67081769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 67081769 is about 8190.3460854838. The cubic root of 67081769 is about 406.3199710957.

The spelling of 67081769 in words is "sixty-seven million, eighty-one thousand, seven hundred sixty-nine".