67983891 has 8 divisors (see below), whose sum is σ = 91337664. Its totient is φ = 44976360.

The previous prime is 67983869. The next prime is 67983907. The reversal of 67983891 is 19838976.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 67983891 - 2⁶ = 67983827 is a prime.

It is a super-4 number, since 4×67983891⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (67983821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86101 + ... + 86886.

It is an arithmetic number, because the mean of its divisors is an integer number (11417208).

Almost surely, 2^67983891 is an apocalyptic number.

67983891 is a deficient number, since it is larger than the sum of its proper divisors (23353773).

67983891 is a wasteful number, since it uses less digits than its factorization.

67983891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173121.

The product of its digits is 653184, while the sum is 51.

The square root of 67983891 is about 8245.2344417851. The cubic root of 67983891 is about 408.1332765766.

It can be divided in two parts, 6 and 7983891, that added together give a palindrome (7983897).

The spelling of 67983891 in words is "sixty-seven million, nine hundred eighty-three thousand, eight hundred ninety-one".