67838689 has 4 divisors (see below), whose sum is σ = 67866624. Its totient is φ = 67810756.

The previous prime is 67838671. The next prime is 67838699. The reversal of 67838689 is 98683876.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67838689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67838609) 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, 9937 + ... + 15310.

It is an arithmetic number, because the mean of its divisors is an integer number (16966656).

Almost surely, 2^67838689 is an apocalyptic number.

It is an amenable number.

67838689 is a deficient number, since it is larger than the sum of its proper divisors (27935).

67838689 is a wasteful number, since it uses less digits than its factorization.

67838689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27934.

The product of its digits is 3483648, while the sum is 55.

The square root of 67838689 is about 8236.4245276698. The cubic root of 67838689 is about 407.8425017656.

The spelling of 67838689 in words is "sixty-seven million, eight hundred thirty-eight thousand, six hundred eighty-nine".