68235647 has 4 divisors (see below), whose sum is σ = 68267160. Its totient is φ = 68204136.

The previous prime is 68235623. The next prime is 68235649. The reversal of 68235647 is 74653286.

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 68235647 - 2¹² = 68231551 is a prime.

It is a super-2 number, since 2×68235647² = 9312207043017218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68235649) 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 3 ways as a sum of consecutive naturals, for example, 12248 + ... + 16925.

It is an arithmetic number, because the mean of its divisors is an integer number (17066790).

Almost surely, 2^68235647 is an apocalyptic number.

68235647 is a deficient number, since it is larger than the sum of its proper divisors (31513).

68235647 is a wasteful number, since it uses less digits than its factorization.

68235647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31512.

The product of its digits is 241920, while the sum is 41.

The square root of 68235647 is about 8260.4870921756. The cubic root of 68235647 is about 408.6364517962.

The spelling of 68235647 in words is "sixty-eight million, two hundred thirty-five thousand, six hundred forty-seven".