67888889 has 4 divisors (see below), whose sum is σ = 68902224. Its totient is φ = 66875556.

The previous prime is 67888859. The next prime is 67888901. The reversal of 67888889 is 98888876.

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 not a de Polignac number, because 67888889 - 2¹² = 67884793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (67888819) 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, 506567 + ... + 506700.

It is an arithmetic number, because the mean of its divisors is an integer number (17225556).

Almost surely, 2^67888889 is an apocalyptic number.

It is an amenable number.

67888889 is a deficient number, since it is larger than the sum of its proper divisors (1013335).

67888889 is a wasteful number, since it uses less digits than its factorization.

67888889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013334.

The product of its digits is 12386304, while the sum is 62.

The square root of 67888889 is about 8239.4714029481. The cubic root of 67888889 is about 407.9430768497.

The spelling of 67888889 in words is "sixty-seven million, eight hundred eighty-eight thousand, eight hundred eighty-nine".