67705243 has 4 divisors (see below), whose sum is σ = 67760280. Its totient is φ = 67650208.

The previous prime is 67705223. The next prime is 67705279. The reversal of 67705243 is 34250776.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 67705243 - 2⁹ = 67704731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67705199 and 67705208.

It is not an unprimeable number, because it can be changed into a prime (67705223) 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 3 ways as a sum of consecutive naturals, for example, 25630 + ... + 28147.

It is an arithmetic number, because the mean of its divisors is an integer number (16940070).

Almost surely, 2^67705243 is an apocalyptic number.

67705243 is a deficient number, since it is larger than the sum of its proper divisors (55037).

67705243 is a wasteful number, since it uses less digits than its factorization.

67705243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55036.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 67705243 is about 8228.3195732786. The cubic root of 67705243 is about 407.5749028634.

The spelling of 67705243 in words is "sixty-seven million, seven hundred five thousand, two hundred forty-three".