68284481 has 4 divisors (see below), whose sum is σ = 68719572. Its totient is φ = 67849392.

The previous prime is 68284477. The next prime is 68284583. The reversal of 68284481 is 18448286.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36192256 + 32092225 = 6016^2 + 5665^2 .

It is a cyclic number.

It is not a de Polignac number, because 68284481 - 2² = 68284477 is a prime.

It is a super-2 number, since 2×68284481² = 9325540690878722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68284421) 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, 217310 + ... + 217623.

It is an arithmetic number, because the mean of its divisors is an integer number (17179893).

Almost surely, 2^68284481 is an apocalyptic number.

It is an amenable number.

68284481 is a deficient number, since it is larger than the sum of its proper divisors (435091).

68284481 is a wasteful number, since it uses less digits than its factorization.

68284481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435090.

The product of its digits is 98304, while the sum is 41.

The square root of 68284481 is about 8263.4424424691. The cubic root of 68284481 is about 408.7339110901.

The spelling of 68284481 in words is "sixty-eight million, two hundred eighty-four thousand, four hundred eighty-one".