67856873 has 4 divisors (see below), whose sum is σ = 77550720. Its totient is φ = 58163028.

The previous prime is 67856869. The next prime is 67856941. The reversal of 67856873 is 37865876.

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 not a de Polignac number, because 67856873 - 2² = 67856869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67856273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4846913 + ... + 4846926.

It is an arithmetic number, because the mean of its divisors is an integer number (19387680).

Almost surely, 2^67856873 is an apocalyptic number.

It is an amenable number.

67856873 is a deficient number, since it is larger than the sum of its proper divisors (9693847).

67856873 is an equidigital number, since it uses as much as digits as its factorization.

67856873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9693846.

The product of its digits is 1693440, while the sum is 50.

The square root of 67856873 is about 8237.5283307555. The cubic root of 67856873 is about 407.8789389159.

The spelling of 67856873 in words is "sixty-seven million, eight hundred fifty-six thousand, eight hundred seventy-three".