67981113 has 20 divisors (see below), whose sum is σ = 107527860. Its totient is φ = 42653952.

The previous prime is 67981097. The next prime is 67981141. The reversal of 67981113 is 31118976.

It can be written as a sum of positive squares in 2 ways, for example, as 31945104 + 36036009 = 5652^2 + 6003^2 .

It is not a de Polignac number, because 67981113 - 2⁴ = 67981097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67981213) 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 19 ways as a sum of consecutive naturals, for example, 23308 + ... + 26061.

It is an arithmetic number, because the mean of its divisors is an integer number (5376393).

Almost surely, 2^67981113 is an apocalyptic number.

It is an amenable number.

67981113 is a deficient number, since it is larger than the sum of its proper divisors (39546747).

67981113 is a wasteful number, since it uses less digits than its factorization.

67981113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49398 (or 49389 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 67981113 is about 8245.0659791175. The cubic root of 67981113 is about 408.1277173690.

The spelling of 67981113 in words is "sixty-seven million, nine hundred eighty-one thousand, one hundred thirteen".