67814689 has 4 divisors (see below), whose sum is σ = 68159124. Its totient is φ = 67470256.

The previous prime is 67814671. The next prime is 67814693. The reversal of 67814689 is 98641876.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66830625 + 984064 = 8175^2 + 992^2 .

It is a cyclic number.

It is not a de Polignac number, because 67814689 - 2⁵ = 67814657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67814699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171922 + ... + 172315.

It is an arithmetic number, because the mean of its divisors is an integer number (17039781).

Almost surely, 2^67814689 is an apocalyptic number.

It is an amenable number.

67814689 is a deficient number, since it is larger than the sum of its proper divisors (344435).

67814689 is a wasteful number, since it uses less digits than its factorization.

67814689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344434.

The product of its digits is 580608, while the sum is 49.

The square root of 67814689 is about 8234.9674559163. The cubic root of 67814689 is about 407.7944005287.

The spelling of 67814689 in words is "sixty-seven million, eight hundred fourteen thousand, six hundred eighty-nine".