67740689 has 2 divisors, whose sum is σ = 67740690. Its totient is φ = 67740688.

The previous prime is 67740661. The next prime is 67740691. The reversal of 67740689 is 98604776.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66259600 + 1481089 = 8140^2 + 1217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67740689 is a prime.

It is a super-3 number, since 3×67740689³ (a number of 24 digits) contains 333 as substring.

Together with 67740691, 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 (67740619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33870344 + 33870345.

It is an arithmetic number, because the mean of its divisors is an integer number (33870345).

Almost surely, 2^67740689 is an apocalyptic number.

It is an amenable number.

67740689 is a deficient number, since it is larger than the sum of its proper divisors (1).

67740689 is an equidigital number, since it uses as much as digits as its factorization.

67740689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 67740689 is about 8230.4731941730. The cubic root of 67740689 is about 407.6460169010.

The spelling of 67740689 in words is "sixty-seven million, seven hundred forty thousand, six hundred eighty-nine".