68287647 has 4 divisors (see below), whose sum is σ = 91050200. Its totient is φ = 45525096.

The previous prime is 68287633. The next prime is 68287693. The reversal of 68287647 is 74678286.

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

It is not a de Polignac number, because 68287647 - 2²⁰ = 67239071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68287596 and 68287605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68287847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11381272 + ... + 11381277.

It is an arithmetic number, because the mean of its divisors is an integer number (22762550).

Almost surely, 2^68287647 is an apocalyptic number.

68287647 is a deficient number, since it is larger than the sum of its proper divisors (22762553).

68287647 is a wasteful number, since it uses less digits than its factorization.

68287647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22762552.

The product of its digits is 903168, while the sum is 48.

The square root of 68287647 is about 8263.6340069004. The cubic root of 68287647 is about 408.7402279552.

The spelling of 68287647 in words is "sixty-eight million, two hundred eighty-seven thousand, six hundred forty-seven".