68634281 has 2 divisors, whose sum is σ = 68634282. Its totient is φ = 68634280.

The previous prime is 68634263. The next prime is 68634299. The reversal of 68634281 is 18243686.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (68634263) and next prime (68634299).

It can be written as a sum of positive squares in only one way, i.e., 66259600 + 2374681 = 8140^2 + 1541^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68634281 is a prime.

It is a super-2 number, since 2×68634281² = 9421329056773922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68634221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34317140 + 34317141.

It is an arithmetic number, because the mean of its divisors is an integer number (34317141).

Almost surely, 2^68634281 is an apocalyptic number.

It is an amenable number.

68634281 is a deficient number, since it is larger than the sum of its proper divisors (1).

68634281 is an equidigital number, since it uses as much as digits as its factorization.

68634281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 38.

The square root of 68634281 is about 8284.5809187912. The cubic root of 68634281 is about 409.4306612815.

The spelling of 68634281 in words is "sixty-eight million, six hundred thirty-four thousand, two hundred eighty-one".