67081969 has 4 divisors (see below), whose sum is σ = 67100580. Its totient is φ = 67063360.

The previous prime is 67081957. The next prime is 67082003. The reversal of 67081969 is 96918076.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30030400 + 37051569 = 5480^2 + 6087^2 .

It is a cyclic number.

It is not a de Polignac number, because 67081969 - 2⁷ = 67081841 is a prime.

It is a super-2 number, since 2×67081969² = 8999981129833922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67081919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1972 + ... + 11749.

It is an arithmetic number, because the mean of its divisors is an integer number (16775145).

Almost surely, 2^67081969 is an apocalyptic number.

It is an amenable number.

67081969 is a deficient number, since it is larger than the sum of its proper divisors (18611).

67081969 is a wasteful number, since it uses less digits than its factorization.

67081969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18610.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 67081969 is about 8190.3582949710. The cubic root of 67081969 is about 406.3203749009.

The spelling of 67081969 in words is "sixty-seven million, eighty-one thousand, nine hundred sixty-nine".