67867880309 has 2 divisors, whose sum is σ = 67867880310. Its totient is φ = 67867880308.

The previous prime is 67867880287. The next prime is 67867880321. The reversal of 67867880309 is 90308876876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38531727025 + 29336153284 = 196295^2 + 171278^2 .

It is a cyclic number.

It is not a de Polignac number, because 67867880309 - 2¹² = 67867876213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67867882309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33933940154 + 33933940155.

It is an arithmetic number, because the mean of its divisors is an integer number (33933940155).

Almost surely, 2^67867880309 is an apocalyptic number.

It is an amenable number.

67867880309 is a deficient number, since it is larger than the sum of its proper divisors (1).

67867880309 is an equidigital number, since it uses as much as digits as its factorization.

67867880309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24385536, while the sum is 62.

The spelling of 67867880309 in words is "sixty-seven billion, eight hundred sixty-seven million, eight hundred eighty thousand, three hundred nine".