68311647 has 16 divisors (see below), whose sum is σ = 103114080. Its totient is φ = 44680896.

The previous prime is 68311637. The next prime is 68311651. The reversal of 68311647 is 74611386.

68311647 is a `hidden beast` number, since 6 + 8 + 3 + 1 + 1 + 647 = 666.

It is not a de Polignac number, because 68311647 - 2¹⁰ = 68310623 is a prime.

It is a super-2 number, since 2×68311647² = 9332962231705218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68311637) 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 15 ways as a sum of consecutive naturals, for example, 22438 + ... + 25299.

It is an arithmetic number, because the mean of its divisors is an integer number (6444630).

Almost surely, 2^68311647 is an apocalyptic number.

68311647 is a deficient number, since it is larger than the sum of its proper divisors (34802433).

68311647 is a wasteful number, since it uses less digits than its factorization.

68311647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47799 (or 47793 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 68311647 is about 8265.0860249607. The cubic root of 68311647 is about 408.7881068757.

The spelling of 68311647 in words is "sixty-eight million, three hundred eleven thousand, six hundred forty-seven".