68884513 has 2 divisors, whose sum is σ = 68884514. Its totient is φ = 68884512.

The previous prime is 68884499. The next prime is 68884531. The reversal of 68884513 is 31548886.

Together with next prime (68884531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39853969 + 29030544 = 6313^2 + 5388^2 .

It is a cyclic number.

It is not a de Polignac number, because 68884513 - 2⁹ = 68884001 is a prime.

It is a super-2 number, since 2×68884513² = 9490152262494338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68884513.

It is not a weakly prime, because it can be changed into another prime (68884583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34442256 + 34442257.

It is an arithmetic number, because the mean of its divisors is an integer number (34442257).

Almost surely, 2^68884513 is an apocalyptic number.

It is an amenable number.

68884513 is a deficient number, since it is larger than the sum of its proper divisors (1).

68884513 is an equidigital number, since it uses as much as digits as its factorization.

68884513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 43.

The square root of 68884513 is about 8299.6694512492. The cubic root of 68884513 is about 409.9276354538.

The spelling of 68884513 in words is "sixty-eight million, eight hundred eighty-four thousand, five hundred thirteen".