67286729 has 4 divisors (see below), whose sum is σ = 67628484. Its totient is φ = 66944976.

The previous prime is 67286717. The next prime is 67286741. The reversal of 67286729 is 92768276.

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

It is an interprime number because it is at equal distance from previous prime (67286717) and next prime (67286741).

It can be written as a sum of positive squares in 2 ways, for example, as 39037504 + 28249225 = 6248^2 + 5315^2 .

It is a cyclic number.

It is not a de Polignac number, because 67286729 - 2⁸ = 67286473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67286789) 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, 170582 + ... + 170975.

It is an arithmetic number, because the mean of its divisors is an integer number (16907121).

Almost surely, 2^67286729 is an apocalyptic number.

It is an amenable number.

67286729 is a deficient number, since it is larger than the sum of its proper divisors (341755).

67286729 is a wasteful number, since it uses less digits than its factorization.

67286729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341754.

The product of its digits is 508032, while the sum is 47.

The square root of 67286729 is about 8202.8488343989. The cubic root of 67286729 is about 406.7333703925.

The spelling of 67286729 in words is "sixty-seven million, two hundred eighty-six thousand, seven hundred twenty-nine".